Ill advised

I went to upgrade my contract, and was told that I will only be paying for the new contract from December. December came and I will billed R910 instead of R365. I phoned Telkom to ask what was going on, and they only said I will billed for both contracts. I was never advised that this was going to happen. I was also billed for random fees which I was also never advised I would be billed for. I phoned and was told there is no manager to help me. The lady on the phone had no idea how to assist me. This is ridiculous, I would have moved my contract had I known this.