Getting back my backup

Members, as per previous email, we hosted on ERPnext but did not managed to have a system local backup of our documents, is there anyway i can do to get back the backup?

What was the URL of your ERPNext account? When did you use it last?

If i have not mistaken, the URL is http://management.taees.org and the last time we used is between 2014 or 2015 to be precise