Upgrade Phonecalls from Virgin

I have booked to go to Cape Town in January, out in E and back in PE, and have received numerous missed calls from a Crawley number, I don't know anyone or any business in Crawley that would be ringing me and i've tried searching the number 01293 831201 and it doesnt come up with much. When I call it rings, goes to hold music then tells me to leave a message.
I would quite like to take them up on ANY upgrade offer as my previous thoughts of "coping in Economy" were thrown out of the window on a recent flight in BA economy back from the states (sub 8hours)
So has anyone got any clue if this is VS upgrades dept? no offers showing in MMB and I am getting to the stage of worry where any offer will be acceptable.
I would quite like to take them up on ANY upgrade offer as my previous thoughts of "coping in Economy" were thrown out of the window on a recent flight in BA economy back from the states (sub 8hours)
So has anyone got any clue if this is VS upgrades dept? no offers showing in MMB and I am getting to the stage of worry where any offer will be acceptable.