For issues with your Learn Profile, Certifications, and Exams (including registration and scheduling), please reach out on the Microsoft Certification forums:
https://trainingsupport.microsoft.com/mcp
Microsoft Certification Program is supported on their own forums.
To receive insights from the targetted audience on Certification related questions, I would suggest you to just re-post the question here- https://trainingsupport.microsoft.com/en-us
Pearson VUE - Customer Service: https://home.pearsonvue.com/Test-takers/Customer-service.aspx
Pearson VUE - Chat: https://home.pearsonvue.com/microsoft/contact