Suspended Cell phone services

MTN has suspended my cell phone services because my contract ended in May 2020 and I requested to not take up any upgrades or other services. I requested cancellation, which was a huge hassle to get processed and no one made me aware that once I have been migrated to prepaid, I won't be able to use any cell phone services for a couple of hours/days etc. I realized this after receiving multiple emails from people who had been trying to reach me via my cell phone number. I am utterly disappointed that after years of honoring all my contractual debit orders as a loyal client, this is the treatment one has to be put through and that is nonsense because, I was on prepaid before taking up this contract. Kindly, reinstate my cell phone services today or I will be porting my number to another network by COB. I am sick an tired of being told they will be escalating matters to the managers which are never done. On the 12th June 2020, MTN decided to load the monthly data and minutes after I explicitly advised that i have cancelled my contract and no longer need those services anymore. Please take back you data and minutes because I don't want/nor need them anymore, i definitely won't be paying for them. I have requested to be contacted by a manager multiple times and I am still waiting till now.