What would you do if your roomate stole your car for hours at night while you were asleep.

Old friend was homeless so i let her and her boyfriend stay here. I wake up a 2am cant find my phone and my cars gone. I told them when they got back to pack there shit and they tried to go to bed. People textin me tellin me they were tryin to sell my phone and a whole bunch of sim cards. So i went in there and yanked the curtain down and they were makin out. I flipped the light on and told them to start packin shit or i was for them. And now they sayin they can call the law for touching their stuff. But they havent signed or payef nothin.