Did not cancel my contract

<p>I got a cell phone contract with vodacom. Cellphone and data contract. They phoned to do an upgrade in December 2016 on my 3g cards. After i told them i can accept it i want to think about they said i have time till 28 December to cancel of i do not want carry on with the contract and cancel it. On the 28th i phoned and cancel the contract gor the 3g cards. Received a reference no. I really struggle to get through to them that day. Now 4 months later i am still paying for something i never accept. They refuse to canvel the lines and said i have signed another contract with them. Which is a lie. They dont even went back to the revordings. Everytime i phone them they put me on hold or transfer me to someone who cannot help. There is never a supervisor to assist me. They cut my phone account now because i did not pay. My problem is i cancel the contract and they refuse to admit they make a mistake. I want someone capeble to assist me. I fo not use that 3Gs. I moved other to wifi the reason for cancellation. Vodacoms admin department are not capable to do there eork and i refuse to pay for there mistakes. Can someone please assist from Vodacom</p>