I couldn’t add my debit card for payment

Hi Aliimraan,

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

Re: I couldn’t add my debit card for payment : keeps declining

You may want to check which payment methods Apple can accept in your country or region: Payment methods that you can use with your Apple ID - Apple Support

See how to: Add a payment method to your Apple ID - Apple Support

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Trouble-shooting:

Check that you are signed in (to your iPhone) with your Apple ID:

How to: Sign in with your Apple ID - Apple Support

What to do:

If your payment method is declined in the App Store or iTunes Store - Apple Support

or

Find out how to pay an unpaid order.

If a message says 'billing problem with previous purchase' or 'verification required' - Apple Support

If you are in India:

About billing for Apple subscriptions and media products in India - Apple Support

or in Europe:

Additional verification that may be required when making purchases in Europe -->

See: About billing and purchases in Europe - Apple Support

More support / info / contact options etc.

Apple ID support / help website:

Apple ID - Official Apple Support

or

Subscriptions and Billing Website

Subscriptions and Billing - Official Apple Support

Please Note:

You may need to allow 24 hours for any changes you make to come into effect.

All the best :-)