Except for that you can't log into their website, they don't pick up their phones or answer their emails, etc.

I would recommend not YOLOing your money into multiple accounts today - rushed decisions are what got us here. If your immediate payroll issue is sorted, spend today and tomorrow working on a diversification and treasury plan with your team, then execute that over the next week or two. At this point, poorly configured wire transfers and scams are much more of a risk than your SVB balance going away.