Step 1: Click "Verify" - Select one of the available offers in your region.
Step 2: Complete the offer! - It may ask for a mobile number. You need to confirm it by entering a PIN recieved by SMS. Be patient while waiting for the SMS as it may take some time.
Step 3: Done! - After you have completed the offer, the Human Verification step will be over. You should recieve your V-Bucks shortly afterwards. Enjoy!