I totally appreciate your concerns, and I understand the urgency of getting your payout hold resolved as quickly as possible.
I realize that sometimes it is preferred to deal with live support rather than email for time sensitive issues like this and for most issues on Shopify, we do indeed offer live chats & phone callbacks. However, our escalated teams such as the one you are dealing with now are required to work via email, in order to adhere to secure processes.
They generally aim to reply to your followup emails within a day or so, however depending on the complexity of the situation it can sometimes take slightly longer. It sounds like you have already responded to the emails and have carried out some requested actions on your store. Our team will be working with you to get this resolved as quickly as possible, and they do appreciate your patience during this time.