MTN is the worst

The worst assistance you can have is with MTN, we have migrated from a contract of which we have given notice in January 2024 to go to prepaid, al was done, but still Febraury, March and April 2024 our bank account was debited, with mails up and down back and forth, they would refund us, till now noting has been done. Now suddenly after being on prepaid i have no service on my MTN phone (sim), calling the prepaid for assistance, we are told to contact the contract side as it shows on their system we are still on contract. At the moment we are battling with a phone the hole day not receiving messages or call, or even to make a call and MTN is not will sort their mistake, we must just keep making calls that are costing us money and they are sitting back not assisting or doing their refunds as promised