NEW CONTRACT INSTEAD OF AN UPGRADE

A vodacom consultant called me for my data contract upgrade (on the 3rd of October) which was supposed to be effective from the 1st of November 2022. They send me a new sim and i asked why because i already have a sim and she told me they will transfer the data to the new sim. The sim stopped working in just a week and for 2 weeks with no network. I phoned on the 27th to inquire only to discover that the consultant created a new contract for me. I told them to cancel it immediately because i wanted an upgrade not a new contract because the old one is expiring February 2023. I was send from pillar to post and told after they listened to the recording they will cancel....mind you i was 45 minutes on the call. Now i get invoices of unpaid bill with arears and yet they claim they will reverse all charges when they found out the contract was done incorrectly. To date no one called and on Friday (25th) i got an email so say my request to convert the number to Prepaid was done. What the hell....does CANCEL and CONVERT spell the same. And the gut to say i am liable for the bill for the month of November while you failed to cancel the contract in time due to your incompetence consultant...please sort processes out and stop messing with our credit score...VODACOM sort this reference (RCO297139) and sort out my bill because i never missed a payment with my other 2 contract. For now i want out, don't bother calling for upgrades. When my contract s expires, i am CANCELLING!!!!