I Just want to Cancel

4 years ago, in 2016 I did a transfer of ownership of contract from my mothers name to my name and upgrade. The consultant messed something up on the system and I got the upgrade but not the transfer of ownership...so I paid my mom the amount each month. They said wait 24 months and when you upgrade again, do the transfer of ownership again. February 2018 came and I went to do the transfer of ownership and upgrade...finally it worked...I thought. Got my new phone, the number was on my name but the coming month the amount went off my mother's banking account. Phoned to fix the billing to my bank account...It's now May 2020...I phoned around 8 times during the year, went into the Vodacom shop multiple times together with my mother, I'm 28 I don't want my mom to have to go to the shop with my... My contract ends end of May. I want to cancel it, because when I spoke to one of the managers at Menlyn Vodacom he said he thinks that the only option, and then I can later open up a new account. I've phoned 4 times in about 8 days to cancel but each time they say sorry it throws out an error...I just want to cancel. PLEASE...before anyone tells me sorry you cant cancel anymore because you didn't give 30 day notice...guys 4 years of struggle...