Please help with this problem

I have a 01 Celica and took it to the dealership yesterday to have the radiator flushed. The heater was working just fine before they flushed it. I now have no heat, plenty of cold air, and a very strong smell of exhaust. What did they do to my car? Any help would be appreciated. Thanks

Check to see if the coolant level is topped off. Look to see if all the hoses have been reconnected. Then ask the dealer what they did to your car.