Overton, Russell, Doerr And Donovan, LLP demanding and vicious letters, lying and stating that I never called them or paid them anything Clifton Park, New York

I received a bill originally from the company I had gotten the MRI from and had paid what I could for a couple months. Then in December, with no notice at all, I get a letter from these guys, stating that I owe $492.37 and it needed to be paid now. I called and talked to someone and that person said it was a general letter and as long as I send something that was okay, it would be taken off the account. January, I get another letter, another nasty letter. This time stating that since the bill was so high, I could only make payments of at least $100. I called again, January 20th. Different person, but they stated the same thing, general letter, as long as I was sending in something, it would be taken from my account. I always write down the check number, the amount and the date of the check of the bills I send out for everything, so I have documentation, not just for them, for everything I do. I have Sept, Nov, Dec, Jan, Feb, Mar, April, May. What gets me, I sent the May check out on the 3rd and the letter I received today from them was dated the 2nd. I haven't received anything from them in about 2 months and they are saying I have failed to make satisfactory arrangements with their office regarding payments of this outstanding balance. Really? Then why is the balance at least half of what is it is when this whole garbage started because it shouldn't have started in the first place? I never got a letter from the physicians offices saying they were going to be putting me in a collections office, even though I was paying on it every month. I called their number this evening, after hours, left a very nasty message and told them I will be calling them tomorrow and I better be talking with someone that actually knows what they are doing tomorrow. Because it sure as heck seems like who ever works there who types their letters and answers their phones have no idea. I have already researched the attorney general office and started to fill out that paper work as well, so in the end, I may not be paying the rest of this bill, this lawyers office may be.