Account still wrong after 3 months

I upgraded my Telkom landline to include Wi-Fi, a package that costs R399/month. The first bill was for more than R1000, but upon query I received an acceptable explanation and paid it. The next one, I was told would be R399. It was R 534. I phoned again and get a sleepy sounding consultant who told me that an agent from accounts would phone me. Nobody did. The following week I went to the Telkom shop in Centurion Mall. Sat with a consultant who called up all my info. Again I told him that I had signed for a package of R399 which reflected nowhere in the bill or on my info. Accounts would phone me. They never did. Went to Telkom Shop in Irene Mall on Sunday. They told me that they could not deal with accounts there. Asked where the contract is that I signed at their shop for my new contract. They said \Head office". Got my latest account yesterday. Still incorrect and still waiting for someone from accounts to rectify it."""