Method of Payment

Hello,

I wanted to adf my new card to my Iphone 8 and set up a visa card as methode of payment but the system tells me that there is an error with a debit card. I tried to add than my master card and the system told me that the card is not valid. Than I tried to add as my methode of pyment the Apple Pay and it looks as well that it is not working. Can you please advice what to do?

Many thanks

Petra