Hi,
Sometimes there is an extended delay before it updates the expiration date. For example, last one I renewed it took almost 12 hours before the date updated (and eventually email came through as well). The ones before that, the expiration date updated within seconds of passing assessment, but confirmation email took hours.
I recommend you wait 24-48 hours and if it doesn't update properly, post a question to Certification forum using link below. The support moderators there can fix your certification profile if necessary.
https://trainingsupport.microsoft.com/en-us/newthread?threadtype=Questions&forum=mcp
Please click Accept Answer if above was helpful.
Thanks.
-TP