Pathetic service

MTN via Rewards and Co upgraded my contract incorrectly. The agent added a 1GB + 50mins pm contract instead of 15GB pm contract that was agreed on. I called on the 22/8/2025 and requested that they listen to the call to get the confirmation of the agreed contract and amend what they have incorrectly done. No response received. In the interim my family and myself are having to buy data due to the negligence of a consultant and poor customer service. I called back for an outcome on the 12/9/2025. Confirmation was received that the investigation was valid and that it was the fault of the agent. I was told that someone will call me prior cob to correct. I called back at 15:40. I was told someone will call at 16:00. No call received. From the 22/08 to the 12/9 and no results. This is really frustrating. Don't promote and sell products that you cannot get right and maintain.