Money taken without authorization

Standard Bank decided without my authorization to debit my account early I don't receive bonus so my last funds were debited and when I called on the 15th Dec I was told I would be refunded on the 18th Dec then I called on the 18th Dec nothing was done so they only processed my refund then I will receive my money on the 19th December they were quick to deduct but not to refund I need my money but they don't care