Debit more than the contract says.

My contract was due for upgrade March 2016, but the upgrade was app**** for 2 months in advance, thus Jan 2016. I signed up for the two contracts of R199 for the 100min plus data etc etc. Now, end of Feb, they debited my bank account with R1593.06 for this two contracts. I phoned them and query about it. 08 March 2016 i received a sms saying the following: \Good day. Case :ID:ID:***9 please note that credits will be arranged and will show on the next invoice. Telkom Mobile 081 180 mazibmc1\" So now I were quite sure the issue was resolved until 26 March 2016 when I received another SMS stating that my bank account will be debited with the amount of R1162.50. AGAIN I phoned, this time CASE ID ***0, saying that the issue was a promotion that was running, it was discontinued, but they kept me on the promotion, but charged me for it, which I did not asked for. It was said that it was escalated and it will be resolved BEFORE 31/03/2016 before the payments will take place. This morning I had another surprise when the R1162.50 was debited from my bank account. This is really *********. If not resolved and Credited back into my account, I want both contracts canceled."