Absa is the worst bank

Absa is the worst bank that I have to deal with, I moved over from fnb to Absa and I regret making that move. A consultant called me to upgrade my credit card to premier of which I agreed to giving the benefit of the doubt to Absa again. I paid my gold credit card and had a balance of R1300.00 to my surprise I see there is a balance showing on the premier credit card of R2500.00. I called the bank to query why and they could not assist me as they said my verification is blocked. I last called Absa in 2022 mid year how can my verification be blocked. I want to know why my balance jumped up when this account was on a min balance of R1300.00?