MTN - Terrible service

I have requested for both my contracts to be cancelled in April yet I am still being billed monthly

I have called 135 so many times, visited the Gateway store where they confirmed my contract was in the process of being cancelled, and also visited the Atrium store who very unhelpfully told me I need to call 135 again as they cannot help me.

I even received the following smses confirming cancellation

Y'ello! Your contract is set to be cancelled on 03/04/2022,03/04/2022. An MTN consultant will be in touch to confirm this with you, or you can call customer care on 135. Have a great day!

AND

Y'ello! A friendly reminder that from 01 May '22, your MTN monthly contract subscription will change.

I am very dissatisfied with the service of late from MTN. Being a MTN customer for so long and having to be told I cannot upgrade my contract due to some ***** alert on my account which no one could explain to me. I have never defaulted or been late on any payment. Now when I cancel as I have no other choice, I continue to be billed on a month-to-month contract.

This is ******** and *********. I expected better from MTN