day before i added my content for approval, today i have received mail in response stating that user name has been duplicated and need to change, but am unable to find where to change it, please help me out of this, mail i received :-

DEAR, NIKHIL

Thank you for being a valued publisher for the Nokia Store. While processing
your registration information for Nokia Publish, we noticed that the public
name ‘NIKHIL’ you have provided has been used by another publisher.

Please note that your registration for Nokia Publish has been approved and you
are able to develop and publish content items to the Nokia Store. This is just
a courtesy notice to highlight the issue to avoid potential content and payment
processing delays.

Kindly provide us with another public name as it has to be a unique name
representing each individual publisher account in the Nokia Store. You can fill
the public name by logging into your Nokia Publish account and entering the
details into the required fields. Further guidance on this can be found at the
Nokia Publish Support site at the following link: Editing Company Information

Thank you for your co-operation in this matter. Should you have any other
inquiries, please do not hesitate to contact Nokia Publish Support.

Best regards,

thank you in advance.