Wost Online customer service. Assisted by inadequate Agent

I chatted to an online agent Thipe Gerald asking why I was suddenly debited for R665.31. He proceeded to tell me it was due to R397.14 outstanding which was debited on 22 Dec 17 and thus PAID and a failed debit fee for R200. I asked him why I am being billed twice for the R397.14 I ALREADY PAID when those two amounts are R598 and do not even amount to R665.31. He than repeated himself numerous times not giving a real explanation for the R665.31 and than disconnected the chat. Telkom is honestly the worst ever in billing. The R665.31 is basically you *****ing money from me which you have no explanation for at all. I will be cancelling my account effective immediately regardless of the term of my contract ridiculous does not even start to describe the incompetence of you customer service and the billing dept is even worse! Just because we live in a third world country does not mean your service has to that of a 'sh*thole country'