Upgrade without consent and refusing to cancel

Vodacom employees and mondo team are ****ming me. They did an upgrade I did not request but was added to my account and then requested this be resolved so I won't to pay for it. But they responded said they have a recording of the said phone call, they referenced it, the phone records don't exist on my phone. I requested for a recoding and they are telling me the company does not allow them to share recordings. Weird right???

They further said I must go to the nearest shop to get a recording and there was no recording attached to my profile. I call them, they put me on hold and dropped me!! I can't be paying extra money for 2 years that I did not consent to.... Everyone who wants to take a contract with Vodacom don't do do it!, they will **** you eventually