It has been said before, but bears repeating: BUYING PINBALL MACHINES IS UNLIKE BUYING ANY OTHER CONSUMER GOODS!
I don't entirely blame the buyers, because the industry markets pinball alongside other "luxury" items and I think this leads some inexperienced buyers to expect that they will receive the kind of hand-holding "concierge" service and rapid resolution of problems that they have come to expect with other expensive discretionary purchases, and I understand why they would be taken aback by the seemingly ambivalent treatment they received (as the OP said, he never thought he would have to work so hard to spend his money).
Additionally, many distributors have been in business for decades and I imagine some have had difficulty adjusting to the changes in the market. Up until probably 10-15 years ago (maybe sooner, I don't have the numbers) the vast majority of pinballs were bought by operators, who have decidedly different "customer support" needs than a consumer buying for the home. Operators don't really typically need a lot of help or "support", they just need to be able to order parts and maybe get a schematic; they also (this is a big one) don't get hung up on minor cosmetic flaws like home buyers do, as no one dropping quarters in a bar/arcade/etc. is going to notice (or care).
That being said, Automated is a stand-up company in my experience; I am sure they are simply swamped at the moment, like everyone else it seems.