Taken directly from thier email:
Your Service Request has been resolved.
After a power outage, all BlackBerry user's needed to be reactivated.
Advised that there isn't any evidence why a reactivation was needed.
If you have any questions concerning this request, please reply to this email within the next three (3) business days.
BlackBerry Customer Contact Center
1-877-255-2377 (North America Toll Free)
0808 100 7466 (Toll Free UK Only)
+44 1753 558400 (Outside UK)