Business ProfileforZeigler Cadillac Buick GMC of Lincolnwood

I went in to sell my car on June 7th for an agreed upon price of $7500. When filling out the paperwork, I shared that I had lost the title to my car and would need a replacement. They assured me that a replacement title can take 4-6 weeks and, one replacement title was in the hands of the dealership, I am able to get paid. I discovered yesterday that it took them 6 weeks to begin the process of getting the replacement title, which includes a lien release from the original lender. Only after they get the lien release (which can still take serveal days), can they then file for the replacement title, which will still take 4-6 weeks. Meaning they will have my car for almost 3 months before they will be able to pay me for it. When I confronted them about recieving payment, they told me "I either had to wait or I can take my car back", and at more than one point during this conversation, they said "tough shit". I have all paperwork and contractsthat they have bought the car, and within that paperwork is clear outline that they would pay me in 4-6 weeks of the contracvted date. I am seeking BBB to investigate the situation, understand why is took 6 weeks to begin filing the paperwork, and ultimately recieve my payment in full as quickly as possible.