Bad service time and time again!

I joined FNB really just because of their reward system, but had I known the trouble it would cause me I definitely would not have done so. It took 4 months for them to get my name right and on one of the many calls I made, the consultant told me over the phone they had corrected it during the call, which turned out to be a lie. They also issued me bank cards with the wrong name on and my debit card was a different account level to my credit card. I also had problems with charges on my account, which were not due, which also took months to fix. Now my most recent encounter has been just as unpleasant. I simply want a consultant from digital banking to call me as I locked myself out of my account and am in the UK, but apparently that department doesn't 'do' call backs. I made it clear it was urgent, but still have heard nothing. I have honestly been so patient - have not gotten angry or been rude, which may be why I have been treated so badly, but now another apology is not going to cut it.