07-19-2013 01:58 PM
Welcome to BlackBerry Support Forums
Have you tried a Battery pull restart yet ! If not then first advice is a battery pull .
Also read this article and see if that helps : You Should Know: Customizing Ringtone, Notifications and Alerts for BlackBerry 7.
07-20-2013 02:01 PM
Tried it..didn't work
With those word I'm unable to figure what you tried ! If above doesn't help then as a next steps contact your Carrier Boost who is responsible for all of your services including formal support.