Nick here from Shopify.
There could be many different reasons as to why your store is unavailable. We have a FAQ topic going through some of the most possible causes and reasons for it which you can see here.
If you have already contacted the support team and are communicating with them, you are already in the correct place and I would advise staying with it there. If you want to share your ticket # in a reply, I can take a look and where things are with it. Let me know.