Paying for a contract I never upgraded- Furious

My contract with vodacom was due for an upgrade last year in December, if im not wrong. In January 2018, i called to cancelled the contract and was told that a debit order request was sent to my bank already so if i do cancel, i would forfeit my airtime. I didnt calcel my R200 airtime but something fishy started to happen. I was not recieving my airtime anymore. I called in April 2018 to have the contract cancelled and was told that an upgrade was done in Richardsbay. I asked for the cancellation as that was ***** and was told that the service request was loaded and the contract would be cancelled by last week. When i followed up last week, the second consultant said it will be cancelled in the next 3 days. I followed up today with the third consultant and she said she will load another service request as I didnt recieve help on the first one. Vodacom had already debited R1302 from my account thus morning. I asked to be transferred to the ***** department but was given a customer care number. When i spoke to the fourth consultant called Lulama she said i must go to the police station and make an affidavit and together with my id copy and send them to Vodacom. My biggest concern is they cant even tell me what the upgrade was for, when it was done and who upgraded? Im staying in Pretoria and i have refused to upgrade my contract. I asked to speak to the manager called Branton Matthew and he couldnt even help. I asked for the documents used to upgrade the contract and was referred to ***** department. I asked for the number and he said they only use email. This is very upsetting for me do all this ups and downs and Vodacom busy taking my money. All I want is for the contract to be cancelled and reimbur*****t. This is pure ***** and their service is very poor