How to top up Call of Dragons in-game gems using Google Play Gift card purchased in SEAGM?

My Lord, your flying behemoth is ready. Your fantasy adventure begins here. Join now!
Call of Dragons is a brand new MMO fantasy conquest game developed by the creators of Rise of Kingdoms.

Note: Google Play gift card sold by SEAGM is a region-locked product. Please ensure the purchase gift card region is the same as your registered Google account.

Step 1: Once completed the purchase from SEAGM, kindly retrieve your game card code in "My Cards".

Step 2: Install and start the application then tap on the ( + ) icon beside gems and choose your preferred gems amount.

Step 3: Tap "Redeem code" to enter the code you purchased then click "Redeem".