We managed to fix our mercury account.
We had proof of business operation.
For the proof of business operation if you have even one customer in the US that will do. Or you can ask another us llc to invoice that one ( a friend successfully did that).
but then they asked us for statement from the
kraken account that we get most of our income from.
We told them we cannot because it is not our account.
With the deadline looming in and no answer from them on how to be able to justify that.
I just generated 500+ pages of (real) invoices for the last month ( there is no users info as we are a no
kyc business) as a last try, and they accepted it.
And now everything is fine \o/