Ridiculous cancellation process.

So I phoned your helpdesk and asked if a movie reservation can be changed to a different date - which, for some bizarre reason, you cannot/refuse to do. Then I emailed you guys to request that you cancel a movie ticket reservation. Now I am being asked to send you bank statements?! BANK STATEMENTS? What the f##k do you need bank statements for when I have already provided you with the reference number of the booking. Surely you should be able to correlate that to your system and confirm that it exists? FFS this is a movie ticket reservation, I am not buying a car. Get some one to phone me and sort this sh*t out.