Upgrade solicitation leads to loss of service

I have a TV that works perfectly fine. I have Xfinity cale television service as well. A few weeks ago I received an email from Xfinity asking if I would like to upgrade my TV box. So I said sure let's do that. After having attempted to install the boxex to my tvs and then having their technicians come out twice to get them to work I was finally decided by their technician that my TV was too old to be supported by the currently available cable boxes. In other words they said that my tv will only work with the old cable box that they required me to turn in to them to get the new boxes. They say that they no longer have and can not acquire a box that will work with me TV. To recap, my tvs worked just fine with the equipment that I had, then I was asked to upgrade without any warning that the new box may not be compatible with my tv, the old cable box was required to be returned to them now they no longer have the old one and can not get on for me. They say the only thing I can do is get a new tv. I can't afford to get a new tv at this time. Do I have any recourse options?