Unable to Use Paypal for Apple ID

Hi,

I've been trying to add my Paypal account as my payment method for my Apple ID, but whenever I try to make a purchase through the App Store or iTunes I keep getting the error message: "Unable to complete this transaction at this time. Try again later or contact Apple Support for more information." I've been trying for several months, but keep getting the same error message.

I spoke with an Apple Support Senior Advisor, and they say that the transaction is being declined through Paypal and they recommend contacting Paypal. I contacted Paypal, and they assured me that everything is fine with my account and they are not declining any transactions. My Paypal account is indeed working as I can make other purchases with it that are not through the App Store or iTunes.

I contacted Apple Support again, and was told to contact my bank about why the transaction is being declined. I contacted my bank and they say they are not declining any transactions either.

Since my Paypal account is working fine for other purchases, the issue must be on Apple's end. There are two things I know of that could potentially be causing the issue. One, my phone is a Japanese model, meaning is was meant for sale is Japan. Paypal is not a supported Apple ID payment method in Japan, so this could be one issue. Second, I'm under 18 in an Apple Family Sharing group, but not sure if this affects any payments.

Does anyone have any suggestions? Thanks,

Henry