I lost everything when i was updating my iPhone 5?

I was updating my iphone on my iTunes and it deleted everything. I restored my iphone and clicked the most recent backup, my compuer was doing it and it unexpectdly froze it.So, i restarted my computer to try it again and the backup was gone and there was a more recent back with noting on it?
What do i do?

I would do a restore on windows to the date you remember you had your backup (assuming you have windows)

By restore I mean system restore

Next time first backup your data on iCloud then do it on iTunes just be safe I do it.

You have to restore the iPhone data. To recover the data, you may need a third-party software program.

Here I would like to share an easy for recovering, you can refer to the following site:
http://www.mac-data-recovery-software.net/, where offers you all the details.