about payment

Review the suggestions in this link about what to do "If your payment method is declined in the App Store or iTunes Store" Click here --> https://support.apple.com/HT203005

If you still have problems Click here --> https://support.apple.com/choose-country-region/media-services Select your country, then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.

or:

Contact Apple for support and service --> "See a list of Apple phone numbers around the world." - https://support.apple.com/HT201232

If you really mean the Apple Store, that's a different forum.

What is the message you see? If this is an email, ignore it or send it to Apple and report it as phishing. If it is a true error message then we need to know the exact wording of the message an what you are trying to do when you see it.

Forward email phishing attempts as an attachment (in MacOS Mail use the paperclip icon) to: reportphishing@apple.com then delete it.