Please make sure that you have linked your account with your Supercell ID. If you have not done this yet, it will delay your top-up process. We can only top up your account AFTER you have linked your Supercell ID to your game account.
Note: Visit this site store.supercell.com to check if Supercell is available in YOUR COUNTRY OR REGION.
If you received this message, then your account is unable to top up: “Supercell Store is not available in >>YOUR COUNTRY OR REGION<<.”