Many schools have an anti-bullying policy that aims to protect students against harassment and abuse. Try and get hold of a copy when you tell a teacher about the problems you're having.
Some schools also have older pupils who volunteer to be 'buddies' to victims of bullying. They can give advice and support, and give you another way of reporting cases of bullying.
If you want to do something about bullying in your school, there are a number of organisations that you can contact to help you set up an anti-bullying scheme or network.
Ask Thurrock has a list of organisations who have staff trained to help in bullying cases.
For information on cyberbullying and safe internet use, go to the WISEKIDS website.