Progress Lost

I had bought a realm for me and my friends, we all got on and started working away. We did about 8 hours of work and when we logged on today the server didn't back any of it up. We were back to the beginning. I went to the backups and the lastest one for me was 8pm. We got off the server around 3am so that was still a lot of time lost and the 8pm was where it was last left. So we had lost 7 hours of work and can't find a way to restore it.