Hey fatimasimss,
If you had followed these steps to request the refund but the status is showing failed, you should generally receive an email with more details if that was a denial. If you're not seeing that or think this purchase should have been eligible still, you can scroll down that page to the Contact us option at the bottom.
That will let you reach out to the support team so they can check back through any issues with that purchase or refund to look into this further with you and see what options may be available, thanks!