How To Update My Name?

So I recently changed my name from Babypicklego to Pickler_Gods and now everything is buggy with my name, for example I show up as my old name in guild list and when they try promoting me they would have to promote my old name but my guild rank still says its unknown when I hover over my name in guild chat. (although they promoted me). I also can not link my discord to the new name cause it will say that the username can not be found (I am writing it correctly) but the crazy part is that 2 days ago I bought champion and I bought it on my new name and it still went through so I'm just extremely confused. Idk if anyone can help but would appreciate the help (: .

 

How long ago did you change it?
Often these things will take quite a while to update.

 

ye not very long ago maybe a week