Business ProfileforBMW of Peoria

On Sept 9th 2023 I went to BMW of Peoria to look at a 2015 Cadillac SRX. I test drove it with the salesmen, ****. As we drove down the street a ways, the check engine light came on. We drove it back to the dealership. He took it back to the service department to run a diagnostic on it. He said it was just the O2 sensor and it's not a big deal. I could still drive the car and it would not effect how it drives. I said no, I was not going to purchase the vehicle if it had the check engine light on. He then spoke to his manager and they agreed to replace the O2 sensors and that would turn off the check engine light. I agreed to purchase it then bc they said it was a simple fix and they agreed to fix it. I paid $12,317.00 that is with tax title and licenses. On Sept 22nd, The dealership picked my car up and took it in for servicing. On September 26th I received a call stating that the catalytic converter needed to be replace first before they can replace the O2 sensors. They dealership said that I would have to pay $4000 to fix the catalytic converter. I refused bc that was not part of the deal. They never told me the catalytic converter was bad after running the diagnostic text. I would have NEVER purchased if I had to pay and additional $4000! I ask for my money back, they said they could not take the car back bc It's already registered in my name and the taxed were already paid on it. But they could put me in another vehicle. I do not want another vehicle. I want this one fixed or my money back! As of 9/27/23 I still do not have the car back in my possession. They still have.