I DO NOT UNDERSTAND IT ONLINE ID PS4?

My little brother just changed my online ID on ps4 to some disabled spam name and I want to reset it. I do not understand how that works. Can someone help me?

psn says, "Resetting to your previous online ID is free and should fix most issues, but it may not solve all the issues (for example, lost content, scores, or features may not be recovered) If you want to reset your Online ID to the previous version, we recommend that you do it as soon as possible, as it may affect content, scores, and features associated with your new Online ID. "

Can someone help me please!

Ehhhm support?

Accept print! And further.

It is nowhere to be accepted

Accept that. And then change your nickname and all the data you need