yeah they should fix it. i used to have to fix other staff's stuff ups all the time. the only time i didn't was when it was almost tax time and the customer was about to do their return anyway and they didn't mind.
I work for the CBA, and we refund with withholding straight away, you shouldnt have to wait til you do your tax, with Term deposits though they can get tricky depending on a number of things. but normal savings accounts refunds straight away