Client Freaked When I Charged $650 to Move Their U-Haul Trailer Full of Junk

Had this wild job last week where the customer booked us for a basic apartment move but showed up with a loaded U-Haul trailer they wanted towed across town. I quoted them $650 flat for the extra hassle with my Ford F-350 and the team of three, but the guy lost his shit calling it highway robbery when we started wrapping everything in moving blankets. NGL, after dealing with the tight parking and his constant bitching, I ain't budging on the price.