I don't know. I see both sides here. I think the guy is certainly out of line being rude to you, but I can understand his perspective. You want him to do the work so that you can have the benefits of buying in store, while paying online prices, which is sort of unreasonable on your part.

The reason online prices are cheaper is because there are no staff doing fittings or manning a store front for you to walk into. You're basically being a cheap skate expecting the lbs to pony up for those services you have no intention of paying for.