Bad service -Paying for the service am not receiving !

I have a contract with MTN since August 2021 and have using the sim and router on MTN go boza until the 25 March 2022 when they suspended my services without any notification and when i enquired I was told that I need to provide my fixed addres since it was not captured when I took the contract telephonically ,I then went to the MTN shop at Mall @ Carnival and they updated the address and told me to call their coverage dept and I did just that and they said it has been reset and should work again...It is the 20 April and my sim card is still not working but the debit order is still going off from my account.