Never ever upgrade over the phone with Telkom

Never do business with Telkom over the phone. My contract had to be upgraded, they phoned me and we did the upgrade. A month or so later they phoned me again and told me that the upgrade was not correct for the amount that I am paying. We then had an argument. Telkom once again phoned after a month or so and told me that everything was sorted out with the upgrade and they are sending me a new device with a new sim and that there will be a small fee that needs to be payed, I had no problem paying it. This month I received my bill and saw that they have charged me for two contracts. I never gave the go ahead for a new contract. I then phoned Telkom just to find out that they can not assist me. If I want to cancel I need to pay the outstanding a mount for the contract that I did not approve. I then asked if we can maybe close the old account (it has not been used since the upgrade) they told me that if I wanted to do that, that I must once again pay the outstanding amount. I asked then for advice and they told me I must go and make a ***** case. (I really do not want to do that because it will then take long and I must then still pay two payments). I then went to a Telkom store to see if maybe they can assist me (I showed them the email that Telkom sent me to tell me that my account has been upgraded). The lady did not even try to help me (she just said sorry call customer service or email them), they were three in the store and one of them were sleeping (It looked as if he had a long night). I would really just like to get this issue resolved without a ***** case.