Ac

Sounds like the blend air door may not be working properly. Basically just a door flap that blocks or allows hot (or cold) air flow from the engine area into the cab where you are seated. So, it may be in the wrong position and thus blocking the cold air from getting to the interior of the car. Since the rear vents are working properly, you know your air conditioner is charged and working properly, so that seems to rule out many of the other possibilities, making a stuck or non-functioning blend door the likely culprit. Its often a mechanic related job, but you may be able to google your car model and find how to do it yourself.