Comatose Call Centre

This i my 3rd Hello Peter on the same query with the same service provider. All you did last week was call me and make me repeat myself, 3 times in one day. Even the manager in that department promises to resolve the issue by yesterday, and I have not heard back since. Please do not tell me here or on email or on the telephone that my query is receiving attention, because it is clearly not. Since the beginning of December my little query is receiving attention, REALLY?!? The question is so simple: I owe you R100, I paid you R50, why do you say I now owe you R72.12. There were no charges, movements or interest to be added - so where do you people get your numeracy s****s???! I though Diners was a high profile product but you people just made it look like a cheap mess.