Pre order for xbox series x says cancelled ???

I'm in major panic mode right now because on my order details it now says my xbox series x order is 'cancelled' !

I ordered it on 22nd September and it has an order number and all my bank details and there's plenty of money in the bank for it so why does it say 'cancelled'?

I've tried to get help but i cant get connected to anybody and there seems to be no answers anywhere ..... i cant find help anywhere.

This was the only present my kids wanted for christmas

What should i do? Is there anyone at microsoft who can help me? Please???

Im in the UK ..... i cant even find a number to call or a chat or anything

:)