2003 cavalier front defrost problem

2003 cavalier heat works jus fine.....but can not adjust knobs to heat up feet or put on defrost it all comes out the vents on your face..soemone help! its winter

sounds like your heater cable is bent. same thing happened to my 04 cav two months after I bought the car. Take it back to the dealer It shouldn't cost you a nickel to have it fixed. Mine didn't.