Bangladesh

Change, add, or remove Apple ID payment methods - Apple Support

You must have an Apple ID for your local Apple Store online. Your credit card must be issued by a local bank and you must have a local billing address.

If your payment method is declined, or you have a billing issue in the App Store or iTunes Store

We’re other Apple users and not Apple. We don’t have access to this. You’ll need to contact the iTunes billing support folks for assistance, if you cannot enter the financial information directly.

Choose your country or region - Official Apple Support and select your region, select Get Support, then select the billing link.