Nedbank bad service

I deposited money R5000 into my Nedbank account on the 26th December at one of the atm. The money was not confirmed and the slip said it retained the money , the atm has an error the money will be into my account within two working days, still the money is not available on the 2nd January 2020 and there was debit orders that went through and my account is on a negative balance..... I call everyday and no one seem to know what is happening. they keep telling me they will come back to me but nothing is done about my quire