how can i get the john stroger cook county hospital to pay for medical bills?

i got dental work done at the cook county clinic of john stroger hospital wich is free to patients with out health insurance but i got a bill for $7000 and they do not want to lower the amount even if i can't pay
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WHETHER YOU CAN PAY OR NOT DEPENDS ON YOUR SITUATION I KNOW STROGER ONLY DOES EXTRACTIONS AND NOT OTHER DENTAL WORK.
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