iCloud storage purchasing problem

Hi, I have been using my apple products for the last ten years. Originally I bought my first MacBook Pro in South Korea and my iCloud account was therefore registered in Korean official address. Then I moved to Bangladesh and around 2015 I started using iCloud additional storage by using my local Visa credit card. But recently I can’t use that card to continue my iCloud storage plan of 200 gb. My bank officer told me that all the card related facilities including foreign purchase systems are okay but in my iPad there is always an instruction to update your payment system. I tried my best to update my newly activated card, but there is a notification that “this card is not valid in your location”. Would you kindly tell me how can I resolve this problem to continue my iCloud storage? Thank you very much in advance.