Garnishment

I have a medical bill being garnished from my pay checks. When I first got the notice of owing this bill I tried calling to make payment arangements. The only arrangement they would except was so much that I wouldn't be able to pay my monthly bills, but they wouldn't budge on how much they wanted me to pay. Soon after I recieved notice of the garnishments of my wages. Again I tried contacting the bill collector and again asked about payment arrangements and they told me that during the 60 days that the order of garnishment was in affect they couldn't make any kind of arrangements. The first time my wages weren't garnished I called them back, and I was able to make tentative arrangement as they had not actually recieved the money from my employer as of yet, but would contact me when they did, and confirm our arrangements, I gave them my address, phone number and also a message phone number. They never contacted me, and shortly after another document of garnishment came in the mail. I did this a few more times after the notices came but eventually gave up. It's been 4 1/2 years and I don't see an end in sight. The original bill was $5,980.00 and after reviewing my W2s for those years I have payed in access of $9,450.00 I understand that there are legal fees and some interest added to the amount of the bill owed, but I really need to be able to make arrangements to pay this bill off, and have the legal fees and interest to stop acumulating so I can get this payed off. What can I do??:mad: