We recommend your Student Union. Your Student Union are there to help students that are struggling with any issues at university. You can speak to your tutor as well. Your tutor will have training in helping students that are experiencing bullying and can make some suggestions on how to combat this. They can also inflict punishment on those that are bullying others as well. Your friends and family are also there to help you as well. With friends and family, you are never alone and you will always have someone to talk to. The police are always at your disposal too. Speaking to the Police will mean that you will be able to look at anti-bullying initiatives that they may run and potentially meet other people who have experienced similar issues.
For more on bullying at university, check out our guide: https://universitycompare.com/university-advice/what-to-do-about-bullying-at-university/