Non-responsive customer service

Good day

I wrote multiple emails to MTN retention and customer care about the cancellation of my contract. I cancelled my contract which is ending in April 2023. I want confirmation of this action and when the last debit order will take place. My records records say the contract will run for 24 months as per the contract terms and conditions of my contract. My first payment was on the 15th of May 2021 and the last should be the 20th of April 2023 (since I changed my debit order date) which equates to 24 months. MTN fails to send me such simple confirmation or even acknowledge my emails let alone respond. Also want confirmation that this number will be converted to prepaid as of April 2023, I dont want problems post April whereby MTN will continue debiting my account as there are many testimonies from people I know about MTN reluctance to process cancellations.

Thulani Mkrola DoB: 09/03/1986 Contact number: *** Pin: 19860