43 days and counting for Dell to make a repair on my G5. Any advice for me?

It's been a Dell customer service nightmare.  4 wasted hours on the phone, 40 minutes on chat, and 5 unanswered emails later, and a Tweet or 2. Plus, many, many broken promises that Dell will get back to me.  And 43 DAYS without my laptop.

The whole step-by-step saga is captured here: https://docs.google.com/document/d/1L0-YlYRsk_chv1fJYjvaZj5TndKG5-2PZa-VXS0aZlY/edit?usp=sharing.

Does anyone have any advice for me?