How I can use "not real name" but officialy using name?

Hi, my FB profile has been disabled since this morning. They say due to my Name problem.

Yes, I was using not REAL NAME, but known as the name.
I've been doing modeling over 8years, my model name is "Glitter EMMA"(not this one but like this).
Peple know as this, and I'm telling ppl when I introduce myself like this name.
So, formaly, this is my name.

Still I have to change as birth given name? It makes ppl confuse and so trouple some.
Please advise me if you know some idea.
 
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