TERRIBLE SERVICE - CALL CENTRES......

I'm still waiting for Nedbank to give me feedback on a dispute of R599 for a transaction that I don't recall authorizing. Now my card has been blocked, my internet banking has been blocked my money app has been blocked....I can't use my account at all.....I'm not paying for a new card because I that I wanted was to reverse the transaction, no one has send me any documents or email or anything as promised.....