Slow service

By error I transferred cash into an old credit card account which was closed in 2021. Unfortunately just like a couple other accounts the credit card still shows on my app. Yes I could hide the account but why did it not decline the transfer and return my cash. After speaking to a consultant as well as going to the branch I'm told I need to wait 72 hours for the refund. I stay with Nedbank but honestly it's such a headache dealing with this bank. I don't rate your service high at all.