i dont owe you anything

I don't think I will ever take a contract with MTN, I have never skipped a month without paying my account yet there are some stupid amounts I don't even know about added on my account, they kept sending me messages until I paid that amount, surprisingly my line has been suspended, please unblock my damn line I have missed many important calls because of this disgusting act of yours, even your call centre is closed yet you are still suspending customer's line without any valid reason,i don't owe you anything