Flying microwave!

I hope you'll consider Hikerdogs suggestion, getgoin. To me that's the most reasonable approach. I understand your anger, and I would be too, but Hikerdogs makes some good points. I personally, would want to talk to the techs, and talk to everyone at Winnie about the potential for other issues. It's unlikely that's the only shoddy area of construction.

Make sure you take lots of pictures of the damage, and inferior workmanship uncovered all ready. You may have to revisit your documents again someday.

Fingers crossed that this is the only issue.