ABSA : UNAUTHORISED REVERSAL

I recently received an unknown payment into my ABSA credit card account from an unknown source. I therafter contacted the branch to assist me with more info regarding this payment received. I was assisted by a consultant who failed to pick up any details and so the query was submitted to ABSA missing payments. I was also advised that I would be contacted by absa if a reversal needed to be done and I would need to authorise the request. I was just contacted by my consultant who advised me that the money was just reversed out of my account today. I received no request for authorisation of funds to be moved neither was I contacted by any individual giving me any explanation. This is ******** and demand answers regarding this transaction as this was not authorised. No individual employed by ABSA should have the authority to remove funds from a clients account without authorisation as this is theft. I will await a response.