In situations like yours, where the CAT 2025 payment has been successfully debited from your bank account but the portal shows the transaction as failed, it is usually due to a technical delay in updating the system. Such discrepancies can sometimes take more than 48 hours to be resolved automatically. It is important to retain all proof of payment, including bank statements, transaction IDs, and any receipts. You should contact the CAT helpdesk again, providing full details of your application and payment. Additionally, keep checking your email for any automated confirmation or ticket numbers. If there is no response within a few days, you can escalate the issue by contacting the IIM Kozhikode admissions office directly through official contact details.