The sales process for a car was efficient, but tha...

The sales process for a car was efficient, but thats where the good customer service ended. I walked in and purchased the car on the spot. They make the close of the sale simple and fast, but the followup was horrendous. They never gave us paperwork for our financing and we did not receive the certification of our Certified Pre-owned. We have had the car for about 6 weeks now and essentially we don't feel like we own the car because they have still have yet to pick up my phone calls or give me a call back.