Incorrect Billing and Bad Service

I received a bill of R236.61 for my Mobile Internet Platinum plan. According to the Consumer Contract Pricing Adjustments notification sent out and their own terms and conditions in your invoicing ( https://mtn.co.za/home/terms-and-conditions/content/2024-monthly-subscription-price-increase), this plan should cost R219, including VAT, now. The billing is higher than what is currently advertised for the plan and is not in line with their own communications and terms and conditions. I have been on the phone for hours with 5 different agents and have visited a store in person today. No one has been able to explain the charge or assist. I am tired of receiving copy/past responses, and having VAT explained to me. R219 + 15% does not equal R236. The increase was also for R4 (or 1.9%) from R215 to R219 and am tired of hearing that the price was increased without agents looking at what it was increased to.