Incorrect charges not being addressed

Telkom have loaded an 8ta add on deal to my account which I never requested and don't want. They also are charging me for Telkom mobile to Telkom mobile calls which I pay 49 per month so I can get free calls. I logged two calls complaining and emailed the proof to Telkom as conveniently for them they claimed they couldn't see my call charges! Which I know to be an outrageous lie and delay tactic. They deleted my complaints. They continue to overcharge me. I am at my wits end with Telkom. Completely and utterly useless customer service and mobile service provider. My previous complaints regarding other service issues remain unresolved. What hope is there?