We have a GE and I just called an appliance repair shop (it's off warranty) and they were able to come that day. Unfortunately, they didn't have the proper belt for our make, so they picked it up and called us the next day. We weren't available Tuesday or Wednesday, so it's really our fault that it's taking until Thursday...
Was your dyer on warranty or did you have to pay for the repairs? I find sometimes warranty work just almost isn't worth it...they don't always so as good a job as if you have to pay!
I think ours was pretty easy to diagnose...a broken belt is pretty obvious...

...so as long as they change it and it works today I am happy! Granted, no time for laundry until Saturday, but still, after grocery shopping I can go nuts!
Sorry to hear your experience wasn't great. I am thinking I am going to call this company for any other problems we may have with washer/dryer...they seem to be very good, very quick, very nice.