Battered from Pillar to Post

On 15 Dec 2021, 2 KFC delivery orders went off my KFC App, the delivery order for R313.40 was duplicated without an order/tracking number due to a glitch on the KFC App as a result my FNB account was debited for 2 transactions by KFC. I sent KFC the FNB sms notifications to prove that these 2 payments were made to them but the FNB notifications says that the transactions were “reserved for payment” on 15 Dec 2021 but does not state that it was paid to KFC. KFC has requested for my bank statements to verify that these 2 amounts were actually paid to them on the 15th Dec 2021 so that they can refund me. Now here’s where the problem arises with FNB, I see KFC banked the transaction on 21 Dec 2021 however FNB reflects the transaction date as the 18th Dec 2021 on my FNB bank statement (Description column) instead of the 15th Dec 2021 which was the actual transaction date. I called the FNB call centre 3 times to query this but was transferred from pillar to post each time, was placed on hold for a substantial amount of time then cut off. Kindly urgently assist me to reflect the correct transaction date on my bank statement so that KFC can refund me for their botched order.