So after looking into all possible accounts, you could have on the server, the one you're active on currently Ardern_Risky I've found that although you joined the server over 4 months ago you never registered your account. So your account has either been reset in a purge (hence the loss of score) I cannot see when you were on prior to this, but in-active account, plus if you were banned (No bans attached to your username/s are being displayed).
Your account was only registered 2 days ago.