Dear Emamuddin, if this is about AIIMS MBBS final registration, there have been issues with the registration process and the payments. Students who have faced the same issue cleared the cache, browsing history, restarted their system and relogged in. It worked for few immediately and it worked eventually for others. If the payment has been debited from your account, you will be able to complete the final registration process. It might take time but you will be able to.