I think the problem could have been an inexperienced CSR. Once she understood that the rig was BIG, and they were going to have to use a big expensive tow truck. In calling around myself looking for a wrecker for a larger rig, I found a couple of places that towed the larger rigs, the charges were going to be something on the order of $500 for the wrecker plus a rather hefty mileage charge on top of that.
I believe that they were trying to get the cheapest way out. The CSR was calling back keeping me informed, but not finding anyplace. GS ERS supposedly has a contract/agreement with a shop on the north side of Atlanta that does diesel work and has a towing service.
Once they found Atlanta Diesel Service, it was about an hour until the wrecker showed up.
Ken