First of all when you go online only talk to people you know.
If someone you dont know keeps contacting you report them.
To prevent all this from happening you could make your account private and make it so that only your friends or people you know can talk with you and you could decline people you dont know.
Some people you dont know might try and bribe you with money or gifts.They might also say comments about you that are nice but dont listen to them they are most probably lying.
If this happens to you more than once it can be classed as bullying so tell a trustworthy adult straight away.
The creator of this guide has not included tools