Terrible Service received from MTN SA & 3rd Party Mobile Plus

Between the 29th and 30th November 2021 i was contacted by your 3rd party vendor Mobiles Plus, (Henna Pillay) and a Team Leader by the name of Genevieve Lazarus for an upgrade on my current data sim contract which is expiring in February 2022 for an upgrade. On the 30th i accepted the offer which was a Black Friday offer and i was told that my current product was being moved to a new product as this was being discontinued. Exactly a month later, this has not been done. I have made numerous calls to your 3rd party vendor, spoke to a Malusi hope he will do the right thing and escalate to the right people. At MTN i spoke to a Nelson from MTN Sales, and i told him he will need to get the vendor and listen to the call and what does he do, he transfers me to Prepaid line and i was lost in thin air after multiple and never ending security checks that do no end and warm transfers don't exist, just being transferred from pillar to post . To make matters worse i am told my application was cancelled cause i di not respond to sms which are being send to the data sim card in my router. Am i suppose to guess that you are sending sms' onto this number for for additional requirements. Why not both to call and ask me on the same number that you called chasing me for an upgrade, you needed a sale right and commission afterwards. Can someone who cares about customer service call me and get these resolved. Disappointed customer of years.