It sounds lie the unit is out of warranty.
Thor is not the only RV company that uses Lippert Schwintek slide mechanisms.
While your issue is very unfortunate, and also very common, it's not really a
PR nightmare or life risking failure for Thor. And, that's why it's not really simple to contact the CEO of any company. What's really important for you, is not such a big deal at the C-Level of a large corporation.