which hotel?
the manager did the right thing not to provide you an injury report. it is probably under the instruction of their insurance company. also, the manager cannot admit fault.
in your case, I am not sure any attorney will take the case since your injury seems minor. have you seen a doctor yet? you need a check up. some injuries may not show symptoms for years. you can sue them then if that happens.
right now, it may be worthwhile to send a letter to them, demanding some compensation through insurance. the letter need be written by an attorney.
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