continuous bad service

So I got call from the hello peter department who promised that the confirmation department will call, They haven’t. I am fuming. I don’t understand why the sales department is so useless really. I called the sales department in the morning and spoke to some ***** lady who told me that my deal was cancelled, how because I got a confirmation email and all. She tried to convince me to take out a deal on another phone, told her iphone or nothing. She quoted me on an iphone and miraculously I now don’t qualify for one anymore reason is because my payment profile doesn’t look good. Apparently I skipped a moth or month. She transferred me to the accounts department where I was told my account is in order. What the hell is going on here? What must a customer do to be services?