Change Apple ID country without changing payment method

You cannot change your Apple account country or region without providing a valid payment method and billing address tied to that new country. Apple does not allow you to switch an existing account's region without a compatible local or accepted payment profile. 

Read this support article about what you should do with your account when changing residence to a new country Change your Apple Account country or region - Apple Support

This is what Apple actually says about payment:

"Have a valid payment method ready: You might need to enter a valid payment method for your new country or region. If you don’t want to enter a payment method, wait until you're physically in your new country or region. Then create a new Apple Account." Apple does not say what it means by "valid". That is simply all that Apple says, though you will see many posts on this forum with personal interpretations of what they think Apple means.

For Uganda Apple says it accepts "Most credit and debit cards". It does not say it has to be a Ugandan card, but if your card is not being accepted then you will need to find one that is, which may well be one consistent with you now being a resident of Uganda.

Thanks. In that case, what is there to do? The app I need most is Mobile Money, essential to live in this country. There must be a solution, I am sure I am not the only person who has moved countries without changing credit cards.