Error: user account has been disapproved

Thanks for reaching out @vivektiwari28. Unfortunately if you’re AdSense account was disapproved this isn’t something we can action within Site Kit. You can, however, reach out to the product experts over at the AdSense Help Center for assistance on this.

You can also use the below guide, which has more information on your next steps if your account was not approved:
https://support.google.com/adsense/answer/81904

Best of luck, hopefully you can get your site approved.