GREEDY FNB WANT ME TO PAY FOR THEIR DELIBERATE "MISTAKE"

The greedy bank called FNB (Credit cards division) wont resolve my problem, deliberately!! What did we do to deserve this??? I was upgraded to Private clients without my permission, now they want me to pay for their own "mistake". I get called by rude people from collection side, they just want me to pay without understanding nor resolving the issue at hand! Today I was told that they will take my case to their legal department, who does that, what kinda silliness is this? How many people have they done this to? Gosh!! My case is now with the Ombudsman for Banking Services, patiently awaiting positive results.