Reserve America cancellations

Is the reserve america cancellation fee set in stone? We were on our way to a campground that we had a reservation for and our rv broke down and was in the shop for 3 weeks. We called them and was told we had to forfeit our deposit. I could understand if we had not called or did not have a legitimate reason for not showing up......Maybe they need to have a system where by cancellations go into a credit account to be used at a later date.......