Hello!
Usually, these types of requests aren't entertained but still I am going to escalate this ticket so that a system administrator could try to restore the latest backup available.
By the way,as far as I know,x10 free hosting servers are backed up on a regular basis.
But,having said that error-free backups are the sole responsibility of the customer.
Please read:
https://x10hosting.com/terms ( Section 6 : System Backups)
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6. System Backups
Backups are the sole responsibility of the customer. x10Hosting retains and offers backups to the customer but does not guarantee this service from failure. It is recommended all customers keep their own backups....
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Thank you for your cooperation.