THINKING ABOUT MOVING TO ANOTHER BANK!!

I don't even know how to start this review, I am just honestly lost for words and I am very dissapointed in FNB. I honestly am even thinking of closing my account with them and rather move to another bank. I tried to apply for a gold credit card on my banking app. Then it gave some kind of error. When I phoned the sales department they told me that they can see that FNB is declining because of a very old account I had which was handed over. Well that account was settled and I owe FNB nothing! The account is even closed and does not exist anymore, so the consultant just said it was because of that account that I had long ago is the reason that FNB does not want to give me a credit card?! Like what is that even? Absa gave me a credit card by not even thinking twice and their service is amazing!! My own bank does not want to give me any kind of credit? I have been a loyal FNB customer for 5 and a half years and this is how I get treated? I am honestly considering moving to a different bank where they actually want to help their customers and not decline on a stupid reason!!