hollywood

My 20 year old son was charged with underage possession at a dance club because he picked a beer up off the floor. We went to court and he was given 2 years probation, had to attend alcohol school, pay a $500. fine and now this is on his record and he is having a very hard time finding a job because when they do a background check this misdemeanor is showing up on his record. He is now 21 but he still has 1 1/2 years to go on his probation. I can't believe that this incident is ruining his young life. He had never been before a judge before this incident and has always been well behaved. We have tried calling the lawyer that we had to pay $750. to for supposedly having it all taken care of and he won't return my son's calls. What can we do? My son is getting very depressed by the whole situation. We never dreamed it would turn out like this. We live in Ohio.