Vodacom Service Sucks

I did a contract upgrade with Vodacom in March 2020. We agreed on Airtime,Data and SMS's. Vodacom DID NOT activate what was agreed to. I have been trying since April 2019 to get them to correct this. They insist I pay for the wrong upgrade and have even handed me to VVM debt collectors. They listened to the recording and called me to say they made a mistake yet 15 months later they hand me over to try and bully me into paying for a contract I did ask for. THEY made a mistake but I should pay THEIR mistake. They can blacklist me but I REFUSE to pay I DID NOT get what we agreed on. Now my number of 20 yers has been taken off the network and "I" am paying for Vodacom's mistake. I have NEVER missed a payment in 19 years and this is what I get