Not debiting, and its affecting my credit record

Hi Everyone,<br> <br> I write this as a very frustrated customer. I have a contract with MTN, they have been debiting from my account since June 2014, I never changed my account number. Few months back they stopped debiting, I went to pay personaly and they said they would fix it. Okay, the next month they debited, but the next one they did not. I went to pay again in cash. they said they will debit it. now they have handed my account to the third party, really?? why? <br> <br> I don' understand this, and this is really reflecting bad on my credit record as I can't do any thing now because of this. My life is on hold because no one will give me credit when I have been handed to third party. This third party called me and I explained to them that My account is always up to date and they said they will check with MTN. but month after month they keepcoming back to me. As we speak my account is up to date, but heeeey I keep being harassed.<br> <br> I really don't know where to go now. because third party says I should go to MTN, MTn say the have fixed it which they have not. And my credit record is poor now because of this.