Bad service nobody wants to help

Good day I am having trouble for almost two months with the account department.I have phoned on many occasions to complain and enquire about why they say I am in debt when I have spoken to two customer service people who told me if I pay R2600 in December that I only have to pay in en of January and then my account is in the clean and not in arrears.I looked at my Vodacom app and shows I am in arrears again.Phoned and then they say its for November that I am in arrears so I told the guy that no I have send proof to the previous people to show that it was debited from my account and that I did pay 2600 in December so don't understand why I am in arrears.He couldn't or didn't want to help me said a supervisor wil call me back in next 24hours next day came nothing.I logged a complaint on hello Peter was told someone wil call me nobody did so I want someone to help me and call me so we can sort it out. The lady I sent the proof of payment to was Sinobabalo Precious and her email is *** on the date of 12 /22/23.The times on that day the one guy and her phoned me was as follow: 8:56 9:40 9:40 9:58 10:29. And somewhere in between all those calls you can go listen I ask her and the other guy from the accounts department if I pay 2600 my account is in the clear and they both said yes.Also on my account the November payment doesn't reflect as it should as paid cause I send the proof of the debit order.so let me know what is happening I am really tired of this if you can't get it sorted I have no other choice to lodge a complaint at the Ombudsman