MTN *****ULANT CONTRACT AND REFUSAL TO TERMINATE CONTRACT AT THE END OF TERM

I have been on a contract with MTN and am due for an upgrade. i have been receiving calls alerting me that i am eligible for and upgrade and have been stating that i will not be upgrading and will cancel and move to prepaid. My ordeal started in May when i called MTN to give my one month notice of my intention of not upgrading and that at the end of my contract i will be moving to prepaid. first call in May i was told that i was early and should call in June to give notice. Called in again on 11 June was advised that my contracted will be terminated on 12 Jul 2022. To my surprise on 13 July, i was credited with data and i called to find out what the problem was and relayed that i had called to give the one month notice. the very same day i then received an SMS stating that i have been moved to a month to month contract ( without my consent) and my new instalment would be R1200. Called back in again and the lady assured me that this was not correct and the money i owe is R40. However since then i have been receiving messages of outstanding payments and that my line would be terminated. i have sent an email ( 12 July 2022) and whats app (05 May 2022) messages, over and above to the many calls i have made in an effort to cancel however have not been successful.

MTN is **********ly entering me into a contract which i have not agreed to and refusing to cancel my contract. the frustrating part is they never send you the recording of call when you request