BILLING ME FOR A PHONE I DONT HAVE

I cancelled by contract for two Sony M5 phones and the courier service collected it last Friday. I have not heard back from FNB since. When calling Adrienne today, I was told that the debit order will still come off my account for the two phones because FNB is waiting for a credit note to be passed by Sony. HOW CAN YOU DEBIT MY ACCOUNT FOR PHONES THAT ARE NO LONGER IN MY POSSESSION? I have an email from Adrienne Johaar confirming that once the couriers advise that the phones are in their possession, the account will be removed from my bank account. THIS IS TOTALLY UNACCEPTABLE!!!! I cannot believe how unprofessional FNB Smart Devices is!!! I WILL NEVER AGAIN EVER GET A PHONE THROUGH FNB OR RECOMMEND YOU TO ANYONE.