having problems with App Store it does not accept my debit card

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 a problem contact Apple:

Click here --> https://support.apple.com/choose-country-region/media-services Select an option and keep on working your way down the menu until you get to one saying your "topic isn't listed". This will present you with support by chat or telephone call.

or

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

Hi seleines,

Welcome to the Apple community where some of us do our best to help each other.

Sounds like you might want to register your debit card as a payment method with Apple ID, for use with the App Store etc.

Apple Support has an article that can help you do that, on phone or Mac, etc. (Just click on the link for their advice.)

Change, Add or Remove Apple ID Payment methods

https://support.apple.com/en-us/HT201266

Hope this helps you with your purchase in the App Store.

Cheers