Cancellation of VS16 on 12.6.13

I've just found that I have been changed from the VS16 to the VS28 on 12.6.13. I've spoken to customer services and they are unable to give me a reason why.
Does anyone else know why the flight has been cancelled as I would assume this to be a busy period so would expect both the Orlando flights to operate each day?
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Does anyone else know why the flight has been cancelled as I would assume this to be a busy period so would expect both the Orlando flights to operate each day?


