Problem with Apple Pay - New in IOS HELP PLEASE

Hello its my first time at ios and also with Iphone. I bought Iphone 11 pro Max yesterday and i try to ADD my Card in Apple Pay wallet but i cant its showing me

1. Could not connect to apple pay / Apple pay is temporarily unavilabe
2. Card cant be Added

No idea Why it happens. My Card are supported and evrythink should be alright. Its any one who can help me ? Please