Proof Of Payments not allocated

I had made a physical payment via my internet banking to Cell C to get my account up to date. The reference was incorrect as the it missed a digit. I then subsequently sent the proof of payment to ********** over 5 times from the beginning of July to now and it still has not been found and allocated to my account resulting in my account being suspended over and over again. This is EXTREMELY frustrating as I have to keep calling the call centre and sending them the proof of payment so they can open my line. I dont understand what is so difficult as I have explained in the numerous emails what the issue is and the correct number to allocate it to!!! The call centre is extremely useless as they cannot provide adequate solution as to what I could do. The answer of "not my job" is unacceptable!!!