You're not telling us what happened but I am assuming you had damage.
You cannot request money from the guest for damages.
If you didn't request a security deposit, I don't think you have much recourse.
It is my understanding that you have 24 hours to get documentation to ABB but I could be wrong about that.
Reporting them to the DTF isn't going to get you anywhere, I don't think, as you accepted the Terms of Service when you signed up.
I don't know what your total damages came to, but I'd write it off as tuition. I'm sure you've learned a lot.