Poor service for customer care

I signed for a new contract on the 28th August 2023, the debit order was supposed to go off on the 25th September 2023. I received an sms informing me that it will go off on the 23rd September 2023, immediately I called the Cell C helpline (084135) and I spoke to a guy (can't remember his name) I told him that if Cell C debits on the 23rd it will bounce as I only get paid on the 25th I even said to him "in this company that I work for it doesn't matter if the 25th falls on a weekend or public holiday we get paid exactly on the 25th) he said ok he escalated my matter and said I will get a reference number ***) after the call. On the 25th I received an SMS saying my debit order as returned as unpaid, then I called again and the lady told me that the guy made payment arrangements on the system instead of changing payment date, now I'm in arrears because of someone who couldn't do his job properly. I am really not happy with his service.