Car Stall problems of the 2014 Chevrolet Caprice

I purchase this vehicle on January 20, 2015 but didn't pick up from dealership until February 3, 2015, I was waiting for the seats covering to be installed along with the remote start I ordered. I notice on about February 10, 2015 the engine light came on, I contacted a local dealership closer to my home they check it on Saturday February 14, 2014 advised me it was my remote that had been program with the wrong codes, I would need to call the dealership where I purchased it. I did I call I was told that was not true by the person in service. I call the local dealership back and took the vehicle back, I explained I also smell a strong smoke along with the engine light being on. The vehicle was checked out again, I have been told that it needs a new catalyst converter which is major for a new vehicle with low low miles. I was told this is the real mileage, I am worry that I will have major problems with this vehicle because I have had to have the engine replace less then 30days of having it. I really believe I was probably sold a lemon. I would like this investigated. I would like to know if I could return this vehicle for another one.