Debit Order reversal assistance needed

I have been struggling to reverse a debit order that has gone off my account. I was referred to the creditor to get the amount back but this company placed a lock on the payment. I contacted the company and they are ignoring my request in its entirety. This company does not have any contact information for them, only email. I contacted the NCR who also confirmed that this company is not registered with the NCR at all. FNB has managed to get all other payments reversed but this one payment (Thank you). There has to be something my bank can do for me to assist me. Please help!