how the hell did you get to this point

is beyond me.

the good thing is that i think even if this thing goes to a court, you will most likely not be liable. as a landlord, your only duty is to give tenant possession. you provide to your tenant a warranty of habitability and a warranty of quiet enjoyment. the warranty of habitability most likely will not be breached unless your rental unit has a housing code violation. if your unit meets the housing code, you have no extra duty to your tenant. if your tenant has some special requirement, it is their duty to seek a place that is suitable. and unless you asserted something or made some false promise to your tenants, and they relied on your promise, i don't really see they have any claim against you.

the bad thing is that now you are in a mess, and you will have to deal with it.

moral of the story, never use a management company. they are really bad.