MTN price dispute

I have contacted both MTN and ICASA and have not been assisted by either. In the last week of January I app**** for a contract with MTN for a device and data deal for R199 per month. No-one from their sales department called me, I was just sent the contract/agreement which states R199 per month for 24 months. The problem comes in that they had a price increase on February 1st 2024 and I am now being billed R209 per month. My dispute is that NO-ONE informed me that this would be the case. I have called them multiple times and they keep transferring me in a little loop between billing, sales and customer service, everyone says it's not their department's problem and transfers me to someone else. Twice I have been told the call would be escalated and a supervisor would call me back with absolutely no record of my call ever taking place (no reference number or record of my call). I know that clause 12 of their contract states they may change the price, but I without warning and for it take effect from my very first bill is completely unfair.