Be polite. be firm, but be polite. if they think you are some kid they can push around, show them from the get-go that they might be barking up the wrong tree. It is very hard sometimes to get an adjuster to change their initial appraisal. don't spend too much time argueing with this guy. BE POLITE!!! Also calmly tell him that if the 2 of you can't get this worked out you won't waste any more time trying to do it this way. Then call his supervisor. Only realize that his supervisor is probably going to side with him. Thats his job. next step is go to the state where you live and contact the insurance commission. Sometimes it stops there. Also consider the state consumer protection agency. If not threaten POLITELY that if you can not get this resolved any other way you'll take them to court. They may not want to deal with that for only 900 bucks. lawyers get good reslults, sometimes, if you get the right one, but they also cost money. Try these other things first because once you step up to the plate and play hard ball, the people you talk to are all going to ask what you have done to give Allstate a chance to fix the situation, so start at the beginning. But remember, if you rant and rave you are only leting them win. The more they try to treat you like a kid, show them that you're a man. A resonable, but persistant man. As for the bit about not being able to buy the part because it's not available, you have the right to get your vehicle fixed. That's what you pay premiums for. When they play these kind of games ask them if they're failing to handle your claim is a bad faith issue? They hate that word, but you remember it well. you could be intitled to legal fees and treble damages if you won a court case and it was found that Allstate jerked you off by not paying. Also remember to use this on them. "You must have thought it was a legitimate claim in the first because you paid on it. the only thing is that you didn't fix it properly because the estimate was wrong, but that's not my fault." if they fixed it once they can fix it again. They may have a point about the dealer but generally if there is additional damage that is undisclosed with the initial estimate they will go back and fix it. If you have to sue them, sue the dealer as well. What's the old line"Sue them all and let God sort em out.
They played this shit with me a couple of years on my house with a $12,000 claim. I finally got $432,000 out of them.
BE POLITE but be firm. Good Luck
les