Did not settle vehicle on trade in!!!

We traded in our Hyundai Tucson for a Chev cruze at the beginning of September at Imperial select Multi franchise in Garsfontein road across from Menlyn in Pretoria.They were supposed to settle the Tucson with the bank as we have signed the contracts and buy and sell agreements, we took delivery of the new vehicle. They were also supposed to get a part of the bumper replaced, they assured me it was ordered, they will deliver. I consistently called, on a weekly basis and spoke to Marie, the fni lady, and Danelle, the Manager. They assured me the vehicle will be settled and the part is on its way. When we entered the final week of the month, I saw the Tucson is not yet settled,I was furious. I called and left messages, but no one got back to me.I called the Dealer Principle, I told him what my problem is, he said he will sort it out immediately and get back to me, but alas, he did not. The debit order for both vehicles now went of my account, I called them, now they want to give me a cheque next week that is going to lie for another 7 days, this is ridiculous,the Dealer principle said thats the way they work, it is unacceptable,I want to go to the onbudsman and lay a formal complaint