Try a battery pull. Re-register via HRT. Re-send service books from the website again. Delete/re-add the email addresses, make sure there's some delay time between them.

Also, create a new hotmail account and "try" to integrate that on your carrier's BIS website. If it works, then it's confirmed, your carrier is on BIS 2.5. If not, then I guess the rep who told you about the upgrade just made it up.