Struggling for debtclearance and no feedback

Early march i received my clearance certificate from debtbusters after we had to correspond with absa twice since they keep sending account bills after we received paid up letters for my accounts that also indicated that the accounts has been closed. <br> When phoning to get my NATIS document of my car -which is one of the accounts- on the 4th of may I was told that the account is still outstanding. I did forward the paid up letters from absa to the mail adress absa gave me. I phoned again on the 8th since i got no feedback. I was told to wait they did fwd the mail to the manager and would get a response by monday. I still got no response. My car could have been sold by now and i feel like my hands is tied because they keep doing the same thing over and over.