Change the profile name

Hello. I have a problem with your site. I registered on the site under my pseudonym (Kate Shlotgauer). Now I need to connect (https://www.paypal.me/shlotgauer ) to my account. I can’t do this, because I must enter my passport data. My real name: (Ekaterina Vlasova). And I can’t change my nickname. What would you recommend me to do? How can I solve this problem? Thank you in advance!