I think that makes you quite lucky! Unless you ate it, got sick and received medical care, there is no case.

If you changed coverage after the accident, it is not retroactive.

Doubful as no report was made and you did not leave the scene.

That's typically of what they will offer for what I surmise is a general release. If you have a "real" claim sue them.

Yes always hire an attorney. You employer has attorney's working for them so why don't you?

This is not a workers compnsation question.. Move out of that room or place. Maybe they'll issue you some sort of credit.

Sorry but unless you get medical treatment, there is not much of a case.

Unless its very serious burns, scarring and medical care no. Seek a refund.

Seek a refund. That is not case, sorry.

Unless you have a warranty or can prove fraud, no.