Camping world thief

Looking for a little advice. Had to leave my RV at Camping World in Albuquerque for some repairs (big slide wouldn't extend). Was told it was going to take a while to get the parts. We are full time with no S&B but luckily we had some relatives approx. 200 miles away that we could stay with. Stuffed what we could in the toad and entrusted our home to Camping World.
When we got our RV back we discovered that all our camera/video equipment and guitar were missing. We reached out to Camping World to let them know about this and all they told us was that they are not liable. Funny side note, they also told us that they had no service techs that played guitar so it couldn't have been them.
My question is what does everybody do with their stuff when they have to get their RV repaired? Do you unload the entire RV and put it all in storage?
Also what action should I take against Camping World. Seriously all they would say is that they are not liable. They didn't care that stuff was missing. There was seriously not a single concern on their part that anything was missing other than me understanding that they are not liable. THIS IS NOT ME. PULLED IT OFF OF Facebook "LIVING THE RV DREAM" PAGE.