Debtbusters BUSTED for pathetic oversight!

I was under debt review with Debtbusters and everything went well and we got into a position to pay off outstanding debt. Debtbusters "negotiated" a settlement amount with FNB and we paid a settlement amount, after which we got a significant portion back. I am still waiting for a clearance certificate. Since then i have received numerous messages that payment was not received. At first i phoned debtbusters about this and they informed me not to worry. Then i got a mail from stating that i still owed FNB an amount, which i got mails from debtbusters that stated that the account was paid in full. Debtbusters said they will investigate. I trusted them to do this as everything up to this stage went well. To make a long story short, i never received feedback from Debtbusters about this issue and this morning i got mails from Debtbusters that stated my account has been handed over and there is nothing they can do for me and then next mail stated that services from Debtbusters are terminated because of non-cooperation!!! Needless to say, i am livid! Talking to their customer services agent, was meaningless as all she told me was that I was 4 months behind on payments! This after the debt was settled! What did i pay a 3rd of the 'negotiated' settlement for?