[A griefer got me...smh HELP]

HERE MY S.O.S.!!

 

Two days ago, I was weapon HUD by and griefer. I accidentally clicked on the I guess particle and I am unable to mouseclick on anything. I have even downloaded another viewer and reinstalled and  cleaned my cache. I can't even open the doors in my house nor sit correctly on anything. How do I go about fixing this problem? I was unable to catch the griefers name. I hope that someone can help me. Thank you

 

* If you're not seriously on helping please do not joke at this. TY*