My sysadmin said that it's ready. You can login and fix it.
In FTP you need the root username and there you will find that there is a backup being generated everyday in the /backup/ folder.
So update to the latest version and we will see if it's being solved.
There might be some custom work there, so before upgrading, keep the old folders in Components , Admin or anywhere else needed and name them Jomsocial_old so that I know.
You can proceed with this. I have limited coding knowledge and I don't have any budget to pay a developer. So I need all the support that I can get from you. You can start whenever you want, but keep in mind to test registration and login system to ensure that nothing is broken, because it'a a live site with 100K unique visitors per month.
Thank you.