REGRET RENEWING MY CONTRACT

I called Vodacom early March 2020 to cancel my contract and not renew for a new term. The lady from vodacom spoke to me and told me to reconsider because she has a upgraded phone with more airtime and paying less than I paid for my previous contract. I still was hesitant but she said it's a no brainer and I agreed. The new deal she worked out for me cost me R358 per month that included R175 airtime a upgraded handset and 5gig data. This was the start of the nightmare for me that I am regretting till this day of 15 July 2020.i started receiving my monthly bill that was way more than I agreed. I thought that it was probably still part of my old contract but at the back of my mind i also remembered that the vodacom sales lady said all the old stuff added will automatically fall to the new contract. I have called Vodacom several times to resolve my billing and have asked them to listen to my recording when I renewed my contract. I have logged 2 billing disputes and have begged the people I spoke to to please help me sort this so that I can move on on what I agreed on. Nothing solved after 2 billing disputes logged, the one thing that is getting communicated to me daily is when will I pay. I WISH I JUST DID NOT RENEW MY CONTRACT. I AM SO SAD AND DISAPPOINTED AND FRUSTRATED. PEOPLE BE CAREFULL WHEN RENEWING CONTRACTS, THEY JUST DON'T HELP YOU.