I want to delete my Whatsapp account
You can delete your whatsapp account through the following steps.


Open WhatsApp.
Press the [Menu Button] => Settings => Account => [Delete My Account].
Enter your phone number in the full international format and tap [Delete My Account].


Please keep in mind that deleting your account is an irreversible process, we cannot undo a deletion if you complete the process by accident.

Goto whatsapp FAQ for more infomation