Stripped radio volume knob

I really cranked the radio up to try and play my plug in Cd player. Since then the volume knob on the radio doesn’t work. Upon previous advise I pulled the plastic cap off the knob, and it is not broken. When I try to move the volume post on the dashboard with plyers the volume does not change even though the post will turn back and forth. Help!!! I need my tunes!!!

time for a new radio. best buy has them for what ever you can afford.