CAN NOT SOLVE A SIMPLE PROBLEM

This is about the 100th request, my line keeps on getting cut to to "non payment" which in fact is not true, you actually have a credit on my account. I have several reference numbers, infact this is the second complaint on Hello Peter. I have spoken to numerous staff from the call centre and they are useless, they always say the problem is solved only for it to happen over and over. I DO NOT WISH TO SPEAK TO A CALL CENTRE STAFF, I WANT A SUPERVISOR OR SOMEONE HIGHER UP TO GIVE ME A CALL TODAY!!!