my credit card is being declined

Hello, 

If you're having issues regarding iTunes & App Store you may contact iTunes Support.

https://support.apple.com/en-us/HT201232 <--- Support phone numbers according to your region

https://support.apple.com/contact <--- You can chat with an Apple Care advisor as well

Note: before contact Apple Care make sure your card doesn't have any international block by your bank.

Regards.

Ask the issuer of the card.

They are the party that is declining your card, not Apple.