How to get Kunkka skin:
Copy the code
Go to FORCE-DOTA.COM and click the button "SIGN IN THROUGH STEAM"
Save your Steam Trade URL on profile page
Enter the code next to the button "Redeem G2A code"
Afterwards you will be redirected to the page with the case where you can open it
Once you open your case, go to your profile and take your prize , by clicking "Get".
Finally, You just have to accept the request to trade in your Steam account
Please note: It is important that your inventory privacy is set to "Public visible" in order to receive purchased skins.