Chloe, why haven't the police helped you? What have they said?
I've read your other posts and you said that your neighbor is blackmailing you. What is he saying to blackmail you?
I can guess your country from your posts and I'm sure that you can be helped if we had more information about the situation, since you live in a first world country that does not tolerate sexual abuse of minors. If you are not getting help from your local police for some reason, please call other police and tell them the whole story. You most certainly do not have to put up with sexual abuse in the country you are in. If you keep reporting him, someone will listen and he will get arrested and you will be safe from him. If you don't feel comfortable calling the police, look up nonprofit organizations in your country that help victims of sexual abuse and call one and ask them to help you.
Edit: You could also call your local Department of Social Services. If you don't know how to reach them, find a number for your city government and call it and tell them you need to speak to a Social Worker and you need the number of the department that they work at. If you don't feel comfortable talking on the phone (I'm saying that because I know that a lot of young people don't feel comfortable talking on the phone) than send emails instead. Or you could even write a regular letter. The important thing is for you to report your abuser right now to someone who will listen. If you don't get a response (but I can't imagine why you wouldn't) then keep emailing or writing to people until you do. Or alternatively, as someone suggested, tell one of your teachers what is happening.