Hi
In order to add a card to Apple Pay, the card must be a supported card from a participating issuer.
Not all cards that are issued by any given participating issuer are necessarily supported for use with Apple Pay.
I suggest that you contact your issuer again to check.
If the card is confirmed as being supported, then I suggest that you contact Apple Support for assistance:
- Contact - Official Apple Support
- https://twitter.com/applesupport
- http://www.apple.com/retail/geniusbar/
More information:
Set up Apple Pay on your iPhone, iPad, or Apple Watch - Apple Support
Get help adding cards to Apple Pay - Apple Support
Apple Pay participating banks in Europe - Apple Support
Apple Pay participating banks in Canada and the United States - Apple Support
Apple Pay participating banks and card issuers in Asia-Pacific - Apple Support