Hi Gbangba,
Thank you for contacting the Microsoft Community.
I can sense the urgency in updating the legal name in your profile for your upcoming exam, so rest assured that I will review the request to make the necessary changes.
For me to locate your profile and to proceed in updating your legal name, I’ll need to verify a few details. I’ve initiated a private message where you can securely share the necessary information. Meanwhile, if the hyperlink provided doesn't work, kindly locate the private message icon as shown below:

If you need immediate assistance with your exam, please contact Pearson Vue Support. They have the necessary information about your appointment and can help with rescheduling options and other recommendations while we are still processing your legal name change request.
I look forward to your response. Please note that if no response is received after two business days, the case will be closed and locked. After the case is locked, we will no longer be able to respond, even through Private Messages. Thank you.
Warmly,