I’m at a loss for what to even do but if anyone has any way to fix this I would so appreciate it . Meta is no help at all and juts going in circles. I had a fb account connected to many chat and it was going great. My fb account got hacked and got disabled. So I created a new fb account and a new business page on Facebook. My old many achy account o can’t get into since it’s connected to my old Fb and many chat has been no help with getting me to access that. 
I created a new many chat as well 
it will not let me connect my Instagram to my new fb business page. I have tried everything possible and this is the error I get eveytime! If anyone has any insight of thye have struggled with this I would love any help!