Hi, thanks for using JustAnswer.com I am Cris and will be glad to assist you. The files maybe still recoverable by going through the website.
Go to the OneDrive site (https://onedrive.live.com/about/en-us/)
On the left pane, tap or click Recycle bin.
To restore all items, tap or click Restore all items. To permanently delete all items, tap or click Empty recycle bin. To restore or permanently delete individual items, pick them by selecting their check boxes.
Please let me know if you have any further questions. Also please take the time to rate my service and submit at the top.