you did the right thing man...keep on them until they fix everything to your satisfaction. They are doing the right thing by trying to fix the problem. I know this doesn't help this time but, next time you go to a place to have work done ask to see pictures or actual things they ahve do before...if it's a good buisness they will have no problem showing you. They would be proud of thier work. If it's a bad buisness they won't want to show you or won't have any photo's.
Word of mouth can be a winner or a killer to a small buisness
Later, rainshdw