VH charging more for accepting significant change in booking

3 of us are booked for virgin package deals to Vegas on different dates next year from Manchester. We knew the route was dropped several weeks back and was told we would be moved to LHR. First friend had hers changed as flights were released no problem. Second friend had to call as two different airline refs to book seats. The person on the phone said she had been moved to Heathrow and the two refs were a mistake but that she would be charged over a £100 for difference between Manchester and Heathrow. She argued it’s their change but they wouldn’t budge saying they had given more than 14 days notice.
My seats aren’t released til September and my exact package in upper on same dates are nearly £4K more from Heathrow. Help ...
the t&c’s say if they make a significant change, they will provide an alternative at no extra cost to the customer . Surely if they cancel a route and move me they can’t charge me more under the package regulations and their own t&c’s?

Does anyone have any idea of what my rights are with regards to the above? Thank you in advance x

Hi, have copied this from the most recent guidance published from the VS trade bulletin, hope this is helpful;

Vstrade
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General Guidance for all rebooking options
On the guidance issued below, travel should be rebooked within (+/-) 21 days of original travel, or prior to 30SEP22 for change fees to be waived
Where rebooked travel is within 21 days of original travel dates, or prior to 30NOV20, fare changes and change fees should be waived, subject to the guidance below.
Where rebooked travel is outside of 21 days of original travel, and on/after 01DEC20, fare difference may apply, but change fees will be waived. Rebooking must be in same cabin, in the original booking class (where available) or lowest booking class.
Part-refund will be permitted if new Total Selling Price is lower than original TSP, where within the above guidelines
One name change is also permitted with fees waived
All travel must be completed by 30 September 2022
Valid for customers with VS (932) tickets issued as above and includes tickets that are usually non-changeable. The validity of the ticket is permitted to be extended to the new dates.
Part travelled rebook is permitted on an earlier date and minimum stay restrictions will be waived.
Where the itinerary includes connection to or from other airlines, rebook travel in the same booking class, or, if original booking class isn’t available on connection, re-book in the lowest available class in the same cabin. No change fee will be charged however additional fare, tax and surcharge difference applies.
Rebooking onto an alternative connecting carrier will be subject to the fare rules as per CAT4 flight application. No change fee will be charged
Where a change to outbound date occurs, return date may be changed to protect the original length of the trip within the permitted travel period.
Rebooking onto an alternative connecting carrier will be subject to the fare rules as per CAT4 flight application. No change fee will be charged

Route Suspended (E.G. MANLAS)
Re-route onto VS/VS* connection where available. For example, MAN-LAS could be rebooked MAN-JFK-LAS where available.
Re-route from different origin – where MAN departure has been cancelled re-route to LON free of charge, though VS would not be liable for taxi/train costs of getting to airport
Neww Origin & Destination: rebook an alternative VS destination with change fees waived. Fare difference appliesOpen ticket: We’ll hold until you’ve decided which option you’d like to take on the above. Must be completed by 30 Sep 2022, fare difference will apply when outside of 21 days of original travelRe-route with codeshare/interline partners where available – subject to rules of the fare. Re-issue required. Fare difference will apply, but change fees will be waivedRefund of unused sectors

Route moves from LGW to LHR
If alternative LGW departures are available to same destination (e.g. LGWMCO during peak), rebook onto other departure FOCSwitch to LHR departure, FOCSwitch to/from MAN direct VS service FOC - where LGW departure has been amended to LHR, re-route to MAN direct VS service free of charge, though VS would not be liable for taxi/train costs of getting to airport.New Origin & Destination: rebook an alternative VS destination with change fees waived. Fare difference appliesOpen ticket: We’ll hold until you’ve decided which option you’d like to take on the above. Must be completed by Sep 2022Refund of unused sectors

Thank you so much. So from what I read in the text part if they reroute me via London they can’t charge me more? I’m not til August next year so I’ll only be re protected onto an alternative such as lhr when the flights are released for my date?
Thank you again x