Disappointed and dissatisfied client

Recently I am having a lot of issues with the network provider. My service has been suspended and when I queried it I was told I owe an amount of R3000+. 09/04/2024 I spoke to a consultant at Cell C and she actually confirmed with her manager that the system is displaying incorrect info. I was then transferred to another consultant which then said that I actually do owe the above mentioned amount. After I have explained that all outstanding jas been paid either by eft amd debited from my account the consultant still insisted that the amount is still dueI have sent through proof of all payments made and just got an email back saying that the amount is still due. I am now wondering if I do owe this amount why did the provider not debit me that amount if I am owing that much which I am not and only debited my account for the amount I usually pay. I am sitting with bank statements going back to October 2023 which clearly shows I have been paying what was due and yet I am not being assisted and my service has neen suspended. I have never had any issues with Cell C up until now and this is really becoming a pain. How can 1 person see what I am sayong and the next is just completely disregarding my concern even with proof I have presented.