How do I get a unauthorized hard inquiry off my credit repor

A emergency room bill from 2010 that I was unaware of because I was told I qualified for the assistance program of this charity Catholic hospital. I never heard a thing again about it until May 28th 2013. (on credit karma) Apparently this medical bill was turned over to a collection agency on May 24th 2013 then they did a hard inquire on May 28th 2013.(just 4 days later with no notice to me, even though all my contact info is as it was when I went to ER in 2010????) Dropping my 2 years of extremely slow and HARD earned measly credit score of low average to VERY POOR! (33 points) I can't even lease a apt now, despite paying a outrageous car payment at an outrageous interest rate PERFECTLY for 2 years and being so meticulous about building (never having established ANY type credit before.) and keeping every point!!!! I managed to get financed despite a gazzilion inquires trying to GET financed!?! This recent medical collections inquire HAD to happen excactly when I needed to get a apartment! Which I would of been able to do had these ppl not submitted a "iquire. I spoke to them and asked WHY only to get some lame offer to reduce and close my debt!(shouldn't they have done that prior to making a hard inquire?) Why would I EVEN want to do that if they have already screwed me!?! They didn't report balanced owed, just a unauthorized hard inquire. Is it legal?