Hi mezillur,
Welcome to the Apple Community.
Not all countries have financial institutions that work with Apple.
Learn if you can buy apps, movies, music, books and more,
or use Apple Podcasts or Apple News, in your country or region.
Find out what services are available in your country or region:
https://support.apple.com/en-au/HT202631
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The link below lists the payment methods Apple can accept from all the countries and regions that participate.
(Adding funds to an "Apple ID Balance" is not available everywhere.)
See what payment methods you can use in your country or region:
https://support.apple.com/en-au/HT202631
NB: If you already verified that a payment method is available in your country or region and you're still having trouble,
try contacting your financial institution.
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If needed:
There is a feedback page to Apple, online
https://www.apple.com/feedback/
All the best :-)