Please Help-Roper Refridge is Freezing Everything

My Fridge is freezing everything rock solid despite turning the cool setting to the warmest possible. My Freezer is appearing to start to frost. I have no clue as what actions to take next. I did unplug the unit for a few hours and left the door open which dethawed the fridge but next morning everything was frozen back.

Thank you in advance for the advice guys and gals!!!

You most probably have a shorted control thermostat AP3084361