How to handle my sister?

ok my sister is the worst, she puches me, gives me brooses, scares, and all that stuff including bleeding, and today she crossed the line, ok my parents have been wanting me to clean my room for a few days, so I said ok I will do it today, I was about finished all I had to do is throw the big pile of garbage away, I was about to leave when I saw my sister in the doorway, she cam in and through all of ht egarbage on the floor then got on my bed and pulled all me sheets and covers off, then got her big bowl of popcorn a dumped on my bed, so a little while later a got all the popcorn and dumped itall over her room and did all this stuff, she told my mom and then I had to clean it all up, my sister told me that I had to clean her whole room, but after I finished my mom said all I had to do was clean up all the popcorn, then I said I had to clean up libby’s room now she has to clean my room, then my mom said no, she didn’t believe that libby made the mess in my room so I have to clean my room all over again and it took 2-3-4 hours the first time, and the whole day I was cleaning the house and libby was doing nothing, then she took all the credit, oh and by the way she is 14 years old, can you please tell me what to do to get her back or lead me to some websites, I would very much appreciate it I have been going through this for 14 years!!!