Ash here from the Shopify team. Thank you for reaching out in the Shopify Community forums.
I understand you've been trying to update the EIN associated with your Shopify Payments account. These cases need to be addressed by our tax team directly, and I see you currently have an open ticket with their team. Thank you for including the ticket number in this post. I've taken a look into the ticket you mentioned, and I see that our team sent out a reply yesterday. Please continue to follow up in that ticket, as that will be the best way to reach a resolution in updating your account information.