Follow the below steps to recover deleted messages on your whatsapp:

Follow the below steps to recover deleted messages on your whatsapp:

1. Whatsapp saves all conversation on SD Cards of mobile
2. Go to Mobile SD Card > Whatsapp > Database: Here you will find msgstore.db.crypt file which contains all messages which you have received and sent in the same day. You can also find another file in same foldermsgstore-yyyy..dd..db.crypt which contains all messages sent and received in last seven days.
3. Simply open these files with any simple text editors.
4. You can now able to read all your WhatsApp messages. Check out this link to recover deleted files on android.