Fnb misleads its customers

I had an fnb savings acc as a student and never used it and one day i get an email from lawyers cause fnb handed me over! The lawyers said its cause of a loan i did not pay? Never had a loan or anything with fnb! Later it was confirmed it was cause of bankcosts i owe seeing i never used it as a student!! I settled the lawyers and my name was cleared with fnb! Now many years later i earn a very good income and having being offered private wealth account! Fnb send me message to upgrade to a fusion acc! I did and guess what according to them they cant seeing i had a back record??? Where is the manager who looks at the situation and see ok this customer was a student and now earns alot so why are we not helping him?? Is that how fnb operate?? Its true what people say about fnb if you ever had just one issues they will never help you again even if they did pay!! Another thing i see fnb is misleading customers if with the pre approved loans or cards exct on the app!! You get an pre approved offer and if you look further you see they have those circles which tells you how likely you are yo be approved and you get like half a circle so that means you wont be helped! So what does fnb do?? They mess up your itc score! You apply cause fnb pre approve you and then they decline you! Every itc check for credit counts against you!! The app is misleading!!