01-03-2013 12:15 AM
Are your contacts associated with an online email address (yahoo / gmail, etc)?
Do you have a recent backup of your blackberry with the desktop manager or blackberry protect?
If not, you can try to reinstall whatsapp to see if the contacts return.
If they do, backup your data using both methods above (blackberry protect is in my signature)
and delete whatsapp. If it gets rid of the contacts, you can then restore the data by using the desktop manager or blackberry protect.
Restore data with desktop manager:
restore data with blackberry protect: