As a DVC member for more than 20 years, I have not stopped thinking about this since you posted originally. This is simply NOT OK. I’m furious just reading about it, so can’t imagine how you’re feeling.
I would definitely try emailing Bill Diercksen as noted above if you haven’t already. And even though I’m a loyal DVC member, if I were in your shoes at this point I would start taking to social media - Official DVC pages on Facebook, Instagram etc? Wherever you can post a public comment. Others more savvy than I may have more creative ideas, but public comments often do receive a direct response. I can imagine you’ve had it with this whole thing, but don’t give up! DVC has impacted you financially and otherwise with no acceptable reason.
So sorry this has happened to you and that DVC is responding in this manner - hang in there and keep us posted.