Hey,

Usually if the amount gets debited from your account and payment is not successful, the money gets credited back to your account within a week. So I will suggest you to wait for a while till the CAT deadline and if the deadline approaches then you should repay the registration fees for successful submission of your form.

After that you can contact the CAT helpline desk as well contact your Upi customer help number. It won't be a much problem. You will get your money sooner or later.

Hope that helps.

Thank you.