Standard back Moving FORWARD not my Standard Back Mine is MOVING BACKWARDS!!!

So i Phoned Standard Bank to reverse a ******** debit order but instead they reversed Money that was paid to me by a Company (CREDIT) Which inevitably puts my Account in a Negative.

Neither the Branch or the call center can help me.

Its a back and forth conversation and to top it all of now that my account is in a Minus (because of Standard bank) they charge me Honorary fees(fees because my account is in a minus).

I have been a client of standard bank for long but if this is not sorted out i will take legal action its now reflecting negative on my credit rating whilst i am in the process of purchasing property and a vehicle and being declined because if this.

Can anyone please please assist with someone that can help?