FNB Fail!

I inadvertently made a double payment to an online business. I immediately called the FNB Helpline in an attempt to reverse one payment. To my surprise, this could not be done unless I completed some forms and returned that, with proof of said payments to FNB Card Division. I completed the form, and returned the completed form, with the required proof of payments to FNB Card on 29 August 2022. I have yet to receive any response from them. Not one word! Thankfully, by now, the merchant had refunded me.