Apple Pay says my credit card is about to expire, it's not, what can I do?

Mine was doing the same. I went into Settings - Wallet & Apple Pay - clicked on my credit card - scrolled to the bottom and deleted it - then when to Add Card and added it back. Everything works now.

There is something wrong with something apple did.

Same thing with me, but going through that update of my card info was not working. I contacted “support” on chat. Whole text conversation was very fishy and I decided I had been routed to an unofficial “Apple” site and that it was a scam trying to get my Visa number and Cvv