Apple ID does not accept an Irish postcode

The postcode and address must be valid for the country of the store you are trying to use. You cannot use an address and postcode from one country to activate an account for use in a different country.

If you still have problems click here --> https://support.apple.com/choose-country-region/media-services Select your country, then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.

or:

Contact Apple for support and service --> "See a list of Apple phone numbers around the world."

Click here --> https://support.apple.com/HT201232