Dicoverg credit card issues- equivalent to *****!!!

My discovery credit card have been migrated from fnb to discovery bank without me giving authorization. My account should be paid off and closed by now but all of a sudden I owe R26000. This keeps staying unresolved no matter how many times I phone. I keep getting emails saying that I need to py R26000 if I want to clos emy account. My statement changed draatically from one month to the other. Everytime I phone I have to expalin everything from the top again. getting nowhere. Getting statements and paying interest on an amount that I do not rightfully owe. Discovery by now owes me money. Nothing is being done about this. I cannot just close account by settling an amount that I do not owe. Hoe long will this be going on????