MTN SA a disappointing service provider

I called the retention department on the 13th of September 2023 and placed my 30 day cancelation notice for the Mtn LTE home internet package. The operator explained to me the pro-rata charge because the provision data is scheduled for the 12th of every month and i canceled on the 13th a day later. I will be charged for the one day data usage. I did receive the scheduled data on the 12th of October 2023 and on the 13th of October 2023 the contract got canceled the the router sms was moved to a prepaid sms. On the 31st of October 2023. I was billed a full premium amount. I called the MTN customer service to query my bill. Reference number ***. I have called MTN customer service almost every day regarding the mentioned reference number because i have requested for a refund or a credit on my MTN account. My query is still opened even though this query was escalated to a few team leaders. No one cares. I been put on hold for hours and even some MTN agents cut the call. It is so sad that MTN SA do not value their customers. Please listen to all the call recordings and brighten my day by resolving my query. Please refund or credit my MTN account. YOUR LOYAL MTN CUSTOMER.