ask them for some cheapo wheels of same/similar size to drive on for those three days so you aren't without a car, mention that its cheaper than a rental car , unless they want to pay for a rental for the time you won't have your vehicle.
Sorry I missed your response. I would find out who they are using. There are some businesses that don't do very good work. I still think if you drop it off in the morning they should be able to have them back to you the next afternoon. I worked for Discount Tire for 28 years until I had to retire. I know Wheel Technolgies does about the best work around. It should be a 24 hour turn around to get them done. One of my son's still works for the company. He had them powder coat his Genesis Coupe wheels black and they turned out beautiful. Have you done anything about getting them repaired yet?