If you longer want a person to be able to message you on whatsapp the
only way
is to block the contact. To block a contact on whatsapp simply
go to Settings>
Privacy settings> Blocked contact. If you have no
blocked contact your block
contact list will show zero. Click on block
contact to add new contact to be
blocked. You can also unblock contacts
by clicking menu on a blocked contact,
then press unblock.
For Android Users: Go to chat screen, tap menu button> Settings>
Account>
Privacy> Blocked contacts. Tap the add blocked contacts
icon in the top right to
add contact to block.
