Lost all progress

Yesterday I logged in the game as I usually do, only to find out that the game took me to language selection and directly into the tutorial again...

I went to blogs and support pages both in Steam and Arrowhead. I tried many different "solutions": restarting both game and Steam, the computer... Nothing works.

It is as if I had never played the game, but Steam shows my 11 hours of gameplay and the trophies, so there is proof. I emailed them hoping it can be solved.

Has anyone else had this problem and/or know what to do or how to fix it?

I'm seriously bummed because I was really enjoying the game, but I really don't want to start over with he first missions, stratagems, weapons...

Anyway, thanks for hearing me. I hope at least this isn't a usual bug because it is really shitty.