cellphone disconnection

i pay my account on the seventh every month with no stress i get a voice prompt today that my cellphone has been disconnected due to none payment. i call the call centre i'm on hold for 20 Min. with no answer, is this the best way MTN can handle an account that has not been paid if it was the case? just disconnect someone's service who has never missed one payment for the provider in almost 5 years now.<br> i'm most certain of this i pay MTN too much and too well for their nonsense can't wait for my contracts to be paid up, i shall never have anything to do with nonsense.