Hello sharmin130,
Let's start off by checking the helpful steps in this article which can help with this issue: If your payment method is declined in the App Store or iTunes Store - Apple Support.
- "Use your device to check your payment information. You might see red text that explains why the payment method can't be charged.
- If your card was declined, add a new payment method or update your payment information. You can add multiple payment methods to your Apple ID.
- Your payment method will be charged for the unpaid balance. Then you can make other purchases and update your apps, including free apps.
If you use Family Sharing and Purchase Sharing is turned on, the family organizer must update their billing information or add a new payment method. If you're not the family organizer, you can't change the payment method."
If the issue persists, further assistance may be needed. We want to make sure you reach the right team for help with your billing issue, so we recommend that you contact Apple Support directly. Depending on your region, you may be able to reach them here: Get Support.
Thank you for participating in the Apple Support Communities and have a wonderful day.