NO REVERSAL

I am really disappointed in FNB. On the 18 October 2017 at 21h04, I tried to make an online purchase on the Zando online store. The transaction was cancelled immediately by the store as I tried to pay with a debit card instead of a credit card. I received an incontact message that R747.00 was reserved for a purchase at Zando on the same day and received a message the next morning that the amount was reversed but the balance was the same and the amount did not reflect in my account. To this day, this amount has not been reserved. When I wrote an inquiry to FNB premier, the response was that this amount is under 'outstanding debit card authorisation' and should clear soon which I fail to understand because this is a pending credit as the transaction was unsuccessful. This looks like a system failure to me. Currently, all transactions under 'outstanding debit card authorisation' have cleared except for this amount. This is really inconvenient for me as I stopped using my cheque card while I wait for this reversal. So much for 'How can we help you?'