Inbox Completely Wiped Out

Inbox Completely Wiped Out

Last evening I discovered my inbox to have been completely empty on an iOS device. I hadn't initiated any deletes, so I checked webmail only to find the messages missing there as well. I've checked deleted items, spam and the archives to no avail. 

I've submitted two support tickets and haven't received any information regarding this critical issue. 

I'm looking for any information that might help me recover my business emails as this is an emergency for me.