Never chat with someone you don't know or haven't seen personally.
If you are being cyberbullied, tell someone you trust. Here is a site you can go to if you're being cyberbullied. https://www.childline.org.uk/Explore/Bullying/Pages/online-bullying.aspx
If you find a button that looks like this, and you are being cyberbullied, click the button.
Don't fight cyberbullying, as it will eventually overwhelm you.
The creator of this guide has not included tools