To Android Owners, please help!

Dear Android owners, i'd like 4 people to help me get my Referral Gems on Knights and dragons, i only need 3 more people to help me do this and it takes literally under 5 seconds

Here are the steps.

1) Go to play Store
2) Search Knights and Dragons
3) Download
4) Open it up
5) Complete the tutorial
6) It'll come up if you have a Referral Code please us this code i really need help! It takes under 5 minutes to do all the steps Doing this will also get you an awesome pieace of armor
Here is my code:
WBB CQY ZHD
Please enter that when it says enter a friend code, i need 4 more people to do it so i get my items ;p
Please i beg you :)