Itunes stop

Can someone please help me cancell my itunes account as the bank cannot stop it.

My bank acc number is ********** 243

This is the message below

Absa: SAVE8243, 18/12/17 ITUNES.COM/BILL ITUNES.C reserved R59.99 for a purchase. Your available balance: R0.29 Help ********** 600; FOURIKD024