Unable to find my iTunes subscription after change of region

I recently changed country/region on my iPhone and now my subscriptions are gone. I cannot change back to my original country/region because apparently, I can only change my region every 90 days. But I need to change my subscriptions because they are being charged to a card I don't use anymore (which is why I wanted to change my region in the first place; so that I can use a new payment method).

What can I do?

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