Scams

After withdrawing some money from a Nedbank atm yesterday, i gave some to my better half. After counting the the R100 notes, she returned one note and mentioned that the note appeared to have been forged. On closer inpection i realised that the note was indeed forged. Where do i go from here? Will the bank refund me with a good note? To the police? I find it astounding that an atm can also spew out counterfeit notes.