customer service

I have received the worse customer service from cell c contact center. I missed a debit order on the 31st December 2022. on the 3rd of January I called to ask them the best way to make payment, the consultant advised to make a eft payment as they wont debit the account and I need to send proof of payment to their *** this was all done. on the 10th I received a text stating my account is over due, I Called them and was advise to send my proof of payment to *** . I have sent the same email thrice every time I speak to the consultants they are no help at all and keep on asking me to repeat the process, I have asked to speak to a manager and the line gets disconnected. I have called 6times and my query is still not resolved, I was promised a call back this morning(16Jan23) no one has called, every time I call I am asked to send the proof of payment. I am very disappointed in your service as I was debited again today when the payment was made already. Your service is ridiculous and very very unprofessional!