So... wait.
You bought a $7500 bike and are now whining about $40 dollar service charge for what is essentially a maintenance issue?
And on top of that, you apparently have the time and ability to completely take apart your rear hub on your own, but again, you're complaining about paying $40 dollars for a bike shop to do it?
I get why you're complaining, but I think it's completely misdirected at the bike shop. You seem to have dropped the ball a few times in this story.
Next time, just do your own work.