MTN please stop smooth talking; DON'T respond if you can't give proof

I wrote two reviews already and each time MTN respond and just smooth-talks so that I can keep quiet. They refer me to MBD and MBD refer me to them and I only need proof of the amount owed to them.

Come on MTN, come to the party so that we can resolve the issue. Please DO NOT respond unless an actual person can send me actual proof, because I won't pay you until you do!! They said they investigated the issue, but they can't provide me with anything. If they or a family member were in the same shoes, would they have just pay a random amount to someone without proof?