Where to buy iTunes in Indonesia

If you have a valid payment method on file, instead of buying or order an App Store & iTunes gift card, you can Add money to your Apple Account balance anytime, no gift card needed, see -> Apple Gift Card - Apple (UK)

Where to buy a physical Apple Gift Card or App Store & iTunes gift card: actually, at an Apple Authorized Reseller in your region, see:

A Ctr (Apple Authorised Reseller)

Central Jakarta City, Jakarta, Indonesië · +62 21 72781114

Best Denki

West Jakarta City, Jakarta, Indonesië · +62 21 56985307

Infinite

South Jakarta City, Jakarta, Indonesië · +62 21 57973648

See also this Apple article:  If you can't redeem your Apple Gift Card or App Store & iTunes Gift Card

If you can't redeem your Apple Gift Card or App Store & iTunes Gift Card - Apple Support

Beware of -> About Gift Card Scams -> About Gift Card Scams - Official Apple Support 

If you still need help, get support from Apple directly -> Get Support or call Apple in your region see -> Contact Apple for support and service or check -> here for more support and assistance.