Your case would be with OMVIC, not the federal government. A reputable dealer will look after you because they too may have recourse with OMVIC, depending on where they got the car from. But regardless, in no case can they walk away from a bad deal with you, the consumer. So make your inquiry with OMVIC and find out what exactly your rights are, and then present this to the dealer. They have to provide you with satisfaction according to OMVIC rules at minimum. If they don't, then you can make your formal complaint to OMVIC and let them get involved. And don't be afraid to let the dealer know that you have researched your rights with OMVIC, either. That way they'll know that they can't jerk you around. But be firm.