Recommend you post your question in Certification forum. The support moderators over there can help get new email address linked to your certification profile:
https://trainingsupport.microsoft.com/en-us/newthread?threadtype=Questions&forum=mcp
Additionally, recommend you contact Pearson Vue in regards to re-scheduling:
https://home.pearsonvue.com/microsoft/contact
If the above was helpful please click Accept Answer.
Thanks.
-TP