Mtn doen't have proper proccess to handle account

I have app**** for a contract with MTN last year March/April and since then they have never debited my account.<br> Three or four month after I took a contract with them I realised that they were not debiting my account, I called MTN to find out why were they not debiting the amount agreed on (R299) an agent told me they were no funds available in my account I asked them what they meant by saying there are no funds available in my account she responded by saying she meant there has never been money in my account, I then asked her to confirm my details only find that they did not capture the correct account number I gave them the correct account they said I must call them to give them a go ahead and debit my account, which did/does not my any since to me to call them after I gave them the correct account number to debit from.<br> What I don't understand I how does MTN approve to have a contract with me without verifying my information that it is the correct give information? Secondly they then hand over my account to same lawyers to do collection where else they have never called me to discuss this issue. I called 14th July to discuss this matter