Vodacom employs ******

I received a telephone call from a Vodacom consultant and she advised me that I was using an old tariff which was expensive and she would move me onto a new tariff which would give me more data for the same price. I gladly agreed just to find out half a year later that she had locked me into a new 24 month contract without mentioning to me that fact. Now I want to get a new contract with a new telephone but they tell me that I would still be liable for the remaining one and a half year for the contract which I have never signed and given No consent to. I have launched an official complain on 13.05.2018 but they don't give a s...t about it. Totally disgusted by these f...n ****** !!!