You have to remember this guy is working for YOU ! You're paying him good money. Don't let him intimidate you. I know you're hurting and he's got you at a fragile time. Breath deeply and relax. Put your hand up when you want to ask him a question so he'll stop what he's doing and make him listen to you! Tell him to knock off the name calling. Get in his face and his type will usually back off. If he won't treat you like a customer, there are dozens other oral surgeons in town! Good luck!