Poor you. That sucks a great deal indeed. But your MoM is right, Christmas can be moved. Food, family, gifts... flip the calendar and you won't be able to tell the difference. So you will have a Christmas :) Cheers to your MoM and enjoy a couple of extra days of holiday here :)
These computer phone assistant (or whatever) are awful. Whoever thought such a thing would improve and speed up services must have been high.