Shocking customer service

I have a sudden unauthorised debit off my account appearing on my statement. (Wesbank First Auto) same group as FNB. I have no dealings with Wesbank First Auto and never have. I phone the 087 number, 15 minutes later after relaying my story to the consultant, I get a reference. A few days later I get an email, telling me exactly what appears on my statement with a telephone number for Wesbank First Auto. The following day I get and sms announcing another debit off my account. I phone the 087 number again, use the reference number and the story. When the consultant states she cannot do anything and wishes to play their "terms and conditions recording" I loose it and end the call. I have twice been to a branch to have the matter attended to only to be confronted with a queue into the car park. Shocking customer service and no way of rectifying.