Mtn South Africa poor service

Hi all My name is Sugan, I am very disappointed with the way Mtn is handling my accounts. I have two lines that are not just suspended but barred as well. Since March last year from lock down I have been making payment via cell phn baking. I have sent proof of payment three times already but my line's keeps on getting open and suspended and the money is not yet allocated. I have no idea what to next as no one seems to be getting back to as I have send emails but not response.