Zero stars for pathetic service from Vodacom

Vodacom has the worst customer service ever! I am trying for almost two years now to just cancel a contract. funny part is that the contract was cancelled before the delivery was made, which means I never received a device from Vodacom! They also started deducting money from my account which some of it I reversed. Then they phoned me with regards to an outstanding account. The more I tell them I don’t have an account with Vodacom the more they phone and send smses. I started to ignore them because I was getting tired of explaining the situation and there is absolutely nobody that can assist me. I didn’t hear from them for a while and last week I got a call to say I was handed over I owe Vodacom almost r5000.00. I asked the if he would pay for a service he never received and his answer was NO. He advised me to get an affidavit and send it to him with a copy of my ID signed 3 times. I was also informed that I was blacklisted until the matter is resolved… is there Anybody that can please assist me with this.