Vehicle Settlement

I've recently requested a settlement amount for my vehicle financed through MFC, I've paid the settlement amount soon thereafter and stopped the debit order due the following day with my bank. I've send through proof of payment and requested where the ledger must be send to. I've received a feedback email that my proof of payment was received and in order. It's been a week since my payment and I phone MFC to find out why I haven't heard anything regarding the ledger or account. I then found out according to MFC a payment was outstanding, after I explained I've settled according to letter received and made payment within the quote dates the consultant asked me if I knew anything regarding a refund due to me. Thereafter the consultant told me the account will now be closed. Next morning I received a text message there are amounts outstanding on my account. I phoned MFC again and the consultant told me I owe MFC money so that they can refund me the amount, the debit order I stopped they want to refund to me but I have to pay it. I have sold this vehicle and it is a week later and I can't get account closed plus it looks like a debit order bounced on my side. Pathetic service!