Dookie just gave some of the best advice you'll ever read.
Besides being an automobile customer, I was a field rep. for Buick, so I've been on both sides of issues. I generally approach things with patience and have found in the overwhelming circumstances it works to my advantage. Most of the people in the auto repair industry are honest, hard-working folks, especially the wrench-turners. If things don't go well it usually starts with service management.
The work atmosphere and the sensitivity to customer satisfaction almost always is the climate set by the dealer level management. I'm sure most service advisors, managers, or the techs. get little enjoyment out of people screaming and threatening them. Going in hot will usually alienate the very people you're trying to get to fix your truck. More times than not it's demotivating.
Regards,
Dusty
2019 Ram 1500 Billet Silver Laramie Quad Cab 2WD, 5.7 Hemi, 8HP75, 3.21 axle, 33 gallon fuel tank, factory dual exhaust, 18” wheels. Build date: 17 July 2018. Now at: 036282 miles.