Im not one normally to complain, and i will put up with a lot of crap from companies.
HSBC has pushed a button of mine. I dont mind someone calling to remind me that i am about to owe them money. What ticks me off is when i get 6 calls everyday (except on Christmas day, and they only called 4 times on Christmas eve) and then they start HIDING their number (is that even legal?) to try to get me to pick up one of their dang calls while i am at work.
Thats absolutely PATHETIC customer service. (oh not to mention you started doing this almost two weeks before my payment was due).
As a result i will never ever pay over the phone to one of your employees because i will not approve of a system like that misuses its phone privileges with its customers.