Disgusting Service - car still not settled

I purchased a new Renault Duster on 25 April 2015 and traded my i20 in on the same day. Everything was fine, received my documents etc.<br> A debit order for the i20 came off on 02 May which was not supposed to. I checked my wesbank account and it said the account was still open. I called the F&I manager at Imperial and was told she resigned and that someone new took over. Spoke to the lady, she said there was a mishap with the documents and the car was not settled but they will fix it and refund the instalment. Its been over a month and the account is still not settled because there was a delay with Imperial, I asked for the proof that it was paid, only to see that they inserted the incorrect ref/account number and that's why the wesbank account was still open. It is now the 28 May and a debit order for the i20 (which I don't have!) is due to come off on 01 June. I was also not refunded the full instalment for April. I am STILL waiting for almost R1000 to be paid back. Spoke to the manager twice, promised it would be sorted, still not. I have to run after Tiaan ALL THE TIME to get a response, and still its not resolved. This is actually pathetic. Will never buy from Imperial again!