I can’t verify my payment

Hi Theotherdanni,

welcome to the Apple (user-to-user) Community.

Re: "I can’t verify my payment details with my Visa card

what is happening"

Apple support's article:

What to do: If your payment method is declined in the App Store or iTunes Store

says:

"If you want to know why a debit card, credit card or other payment method has been declined, speak to your financial institution. Apple doesn't have information about why the payment method was declined."

There is also much more info. in the above article.

If you have disputed a charge from Apple, you may need to ask your card-provider to allow payments to Apple again.

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Re:" I also can’t download apps when it asks me to input my payment"

If it is more than just sorting out a valid payment method:

What to do: If you can’t download or update apps on your iPhone or iPad – Apple Support

or

If you can't download or update apps on your Mac - Apple Support

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If help is still needed, after contacting your financial institution:

You might want to reach out to the App Store Support Team:

(There is a "Get Support" link (or use the support app) at the bottom of their webpage (link below)

App Store - Official Apple Support

or

Subscriptions and Billing - Official Apple Support

All the best :-)