Use the "Link/delink a personal account to ANZ Internet Banking" function in ANZ Internet Banking. This will take 24-48 hours. See Link or delink a personal account* for more information.
Contact the ANZ Internet Banking Helpdesk on 13 33 50 (International callers: +61 3 9683 8833) 24 hours a day, seven days a week. This will be immediate.
Visit your nearest ANZ branch. This will be immediate.
*If you're an ANZ Internet Banking for Business customer, you can't link your personal credit card or your business credit card to your ANZ Internet Banking for Business CRN directly. However, if you have any other personal CRN, you can request the credit cards to be linked to it.