Help!

Hi, I got my aligners in the mail a little less than a week before they announce their closing. I have not started them, and I want to refund obviously this is a bit sketchy. My question is they’re asking for me to sign the acknowledgment of their current situation Before they’re able to even communicate with me. Have any of you signed that and are there any repercussions to signing that I don’t wanna be denied a refund if I do sign it? I’ve already disputed with my bank