In the meantime, I'm going to have to rent a car to get around. They don't have any loaners.
That's BS. If they don't have a loaner available, they can rent you a car and bill it to FMC for up to ten days. No skin off their butt whatsoever. The SA is jacking you around for no good reason other than enjoying doing it. Once I found that out and called the SA on it, I had a rental within the hour.