How do I block contacts on whats app, calls and sms?

I would like to block specific numbers in my contact list to prevent incoming calls, whats app and SMS. I am unable to find the features on my phone.

For Whatsapp:
-Go into the actual Whatsapp app (not the hub)
-Swipe down from the top bezel
-Tap settings
-It should be somewhere in there

For calls and sms you'll have to download an app from BlackBerry World, like Blockr