I signed up for wifi not *****....what a nighmare

In October I enquired about vodacom wifi and accepted the quote of R680pm on uncapped wifi. All of a sudden i saw a deduction of R1800 from my account and enquired from vodacom and they said that a phone line was added to my contract which i did not request or order. I asked the lady to cancel it as i had no knowledge of it and i already have to cellphones and do not need any other. She told me she would cancel it. She did not because a month later December 2020 vodacom debitted R6780 from my account which bounced and I enquired once again and i was told it is the bill for the phone line not the wifi. I called vodacom and asked that they cancel this once again and i was informed that inorder to cancel the contract I must get an affidavit from the police station confirming that i have no knowledge of the phone line and also present my ID to take to the store.I did so on the 11 January 2021. The store manager email the documents on the 12 January 2021 to *** and I was provided a reference number. 3 weeks later they (***) email me asking for the same documents and there is no phone number provided to actually explain to them as they only communicate via email. I have sent several emails and there is no resolve. Vodacom cancelled my wifi only after 1 month of being a customer because of this. this is ridiculous. i only signed of for wifi not this headache. I have called vodacom several times and get different from responses from different agents.