Robert ... I have said it earlier in this post and I will say it again ...ATTORNEY... I know all situations can be ugly, and this one is certainly that! Listen, I have been to the point where, well you just wonder. In 1986 I had back surgery, a walk in the park compared to your situation.
Anyway, there is an old saying, "take the bull by the horn" Just my opinion, I thinks its time to make a phone call and tell them, LOOK you are putting the shaft to me and I am not going to tolerate this anymore, remind them about your loyal patronage to them, how good of a customer you have been and try to negotiate a settlement, if its good for you and good for them then its a good deal. A VERY stong letter from a reputable attorney, cost maybe a hundred or so bucks, may very well intimidate them to the become more open minded and become very willing to discuss things.
In closing, I know when a man is down even a hundred bucks or so can be alot, and please, please do not be offended when I tell you ...step up and tell them they have s***wed you!
Your TBN S.E. Oklahoma free advise friend!!