Bad service at Telkom

I took out a data contract with telkom in April 2017 of R199.00 per month for 24 months. My contract was fine the first 05 months and then in December 2017 an amount of R1100.00 was debited. I called telkom yo enquire and was told it was extra usage, i then requested for the usage to be brought to R50.00 which was done and received an email to confirm such however in February 2018 my contract was debited with R2500.00 and when I enquired I was told it was usage again..I have called telkom and also visited its branch in order to understand what was going on but no one seems to tell me the problem....I stopped using the data sim in May 2018 and to my surprise received an invoice today totalling R2697.00, I have contacted telkom but I am not getting assistance.

Telkom is tipping people off. Hello Peter please intervene