Bad Service at Telkom even their Customer service is useless

I took out a contract at Telkom Germiston I ask the consultant to set a limit for my contract so that I don't pay more than R200, then he advise me he did so, 4 months later I get an SMS that my bill limit is R541 then I paid the R541 via EFT 2days later they debit me again, when I contact them they told me the R541 does not reflect on their side I should send them the proof of payment I sent the proof of payment on the 15 October to their consultant by the name of Mbali Simela till today the 20th October no feedback from the consultant, I've decided to cancel my contract with them but I still want my money, as much as their contract are cheap their service is *** be aware.