Hi,
Did you try accessing the following link?
https://www.microsoft.com/en-us/learning/dashboard.aspx
Also note that Microsoft Exams/Certification are not supported here on the Microsoft Q&A forum, if you still have issues accessing your certificates I suggest you ask the experts in the dedicated Microsoft Certification forums over here:
https://trainingsupport.microsoft.com/en-us/mcp/forum/mcp_cert-mcp_certificates
(Please don't forget to accept helpful replies as answer)
Best regards,
Leon