Ps4 minecraft gamer tag and pb change?

I got MC yesterday and linked it to my ms acc. I have now got a random name and pb. I actually changed it yesterday on the xbix page (supposedly it works with xbox even though you have a ps4) but it still hasn't changed ingame.

This often takes time, try again if necessary.
Make sure, however, that you are really logged into your account and not that of your brother or sister etc.

And also make sure that you do everything right and do not click yourself wrong.

Sign out and sign in again. Maybe that works. Otherwise, wait is the order of the day…