Lack of service

Last week I called Discovery bank call centre. Reason being is that 3 unauthorized debits went off my account totalling R1 200.00. I did not authorize anyone to debit my account. I was told by the call centre agent that this would be urgently attended to. To date nothing has been done and the debits were not reversed. It might not seem like a lot of money but it is my money nevertheless. I really require urgent assistance as I am getting nowhere with Discovery Bank