I booked a trip through a TA who is not very disney educated. I had to do it in order to use my $500 in travel vouchers. I had originally booked the standard dinning plan (1 table, 1 counter, 1 snack) plan way back but I did the math with menus and we will not spend that much. I am 41 days till we leave. My TA says I can not cancel the dining plan now. Is she right?