FRUSTRATED VODACOM CLIENT (I would give you a 0 rating but there's no option for that)

I've been trying to contact Vodacom to cancel a data contract. I've had this contract since 2015 so it is way way over the agreed contract period. It cannot be canceled within store and has to be done over the phone. Ive had no success and each time waited on a call for more than half an hour only for the Vodacom assistant to drop my call so I have to start the entire process again. I'm paying R 110 a month for 2 gigs of data - this is actual ****************. Worst network, worst service and such rogues. Vaneshree who assisted me also refused to cancel my contract and offered a data deal of 30 gigs anytime data and 1 gig night owl which she was supposed to confirm and didn't. I spoke to a new guy Mandisa and he couldn't find this deal so that was a lie and as soon as I confirmed that I wanted to cancel again he cut my call. I mean what the hell Vodacom really?? Should I just continue to pay R 110 a month for 2 gigs of damn data?? Frustrated and will never recommend this network. Glad I took out my cellphone contract with MTN. Your company should take a page out of their book