One of the easiest and most reliable ways to deal with cyberbullying is to block or report negative online behavior.
If someone is bullying you online, before you delete their comments, take a screenshot to save as evidence, in case the bullying escalates and you need evidence in the future.
Most cell phone carriers and devices allow you to block people. Google it or contact your carrier to learn more.
If someone is bullying you over text, don’t try to beat the person at their own game. It’s usually much better to ignore them. Eventually most people will get bored and give up. If that doesn’t work, get help from adults.