WORST NETWORK EVER!!!!!!!!!!!!

i recently upgraded my vodacom contract and surprisingly I am now being charged double for the contract. I also CANCELLED a contract and surprise surprise the contract was never cancelled. I find it rather strange that I sign up for a contract of R299 and end up with a debit order going off of nearly R800!!!!!!!!!!!!! And then when calling the call centre dealing with a rather ****y call centre agent!!!!!! This is not what i agreed to and to me this is considered *****, I do not wish to continue ANY of my contracts with Vodacom and i regret now having upgraded. DISGUSTED!!!!!!!!!!!!