Please why can't I buy iTunes gift card? (Nigeria)

iTunes gift cards are available in a number of countries, not just the US, but all iTunes gift-cards are country-specific - they can only be redeemed and used on accounts in their country of issue.

If/when Apple might make them available in Nigeria we won't know (these are user-to-user forums) until Apple announce something.

Some games are only available in particular countries, it depends upon where the rights-holder grants Apple a license to sell them (and the same thing applies to other content e.g music etc). It looks like the game is available in the Nigerian store, if I'm looking at the correct game, but the description page in the Nigerian store doesn't have the 'top in-app purchases' listed on it, so I wonder if they are available in the game in the Nigerian store

Game Of War - Fire Age : Nigerian store description page :

US store description page :

I'm assuming that it's the game itself, normally games that have IAPs have the 'top' ones listed on their description page in the store, but that game doesn't - other games in the Nigeria store have their top IAPs listed so it's not as though they aren't possible in Nigeria. Do IAPs show as an option when your country is set to Nigeria, or do you get an error message when trying to buy them ?

If it's not showing as an option in the game then the developer should be the ones to look into it, as it's them that are potentially losing money : http://www.machinezone.com/contact/

You can also contact iTunes Support via this page (but they might just tell you to contact the developer) : http://www.apple.com/support/itunes/contact/ - click on Contact iTunes Store Support on the right-hand side of the page