Do I report them even though they have already been told off by a teacher?

did you tell your friend about her 6ft lad then because what happens if she doesnt know that he is doing it to you which is your friends bf or something, you should tell her about her 6ft boy and also you should tell your head of year aswell and they will proberly keep an eye out or something, was there any teachers in the field aswell looking out for trouble which you had, etc.