Telkom should close down bad customer service

Telkom customer service is bad and they just want money money money A telkom rep called me on September 26th and wanted me to upgrade and renew contract I told him to please put in 30days notice on the wifi as it's very old and I struggle with network but please renew or keep the R99.00 Sim card running as I still use this. I said it's done and I made sure by repeating 3 times "so on 1st October I pay for September usage the R550something and than 1st November for October usage R550 something because of the notice and he said yes that is right and than than 1st December I only pay the R99 of the Sim. He said yes" only to find on 1st December full R550 was deducted so I reversed as this was not agreed. Now they sending me threats to hand over and effect my credit records.