Incompotent call centre and very poor service from bank

When Discovery credit card went over from FNB to Discovery Bank, they managed to mess up our contact details. Somehow reinstating very old cellphone numbers as our current numbers. My husband's got fixed, but mine has been an ongoing process for more than a week. I want to activate my new credit card, but it sends the OTP to an old number. When you phone in....explain everything to the operater they still try to verify you through OTP methods even if you tell them that is the issue. Eventually a query has been logged on 28 July and someone from the OTP department will phoned me back. I phoned backed numerous times becuase the said call back never happened. The one time I was put on hold, waiting 20 minutes...when the call was dropped. Then suddenly one operater discover that my current number was taken down incorrectly. Ok...so I finally receive the phone call from the OTP department and the issue is said to be resolved. But when I try to activate my credit card.....the OTP is still sent to an old number. Phone for the 8th time today....regarding the same issue but they had to logg a new query as the previous one is recorded as resolved. Now have to wait another 72 hours for a (hopefully) call back.