The symptoms were very similar. The buttons on the right hand of the screen stopped responding, again. The soft buttons on the screen mostly stopped functioning.
Very frustrating.
Anyway, I called them again, and I talked to one of their technical supervisors. He sent me a FedEx shipping label with 2 day service. I also typed up a letter and added to the box, describing the symptoms and asking for expedited service and some additional quality assurance since the first repair was not successful.
We'll see how it turns out.