Total lack of service from FNB's ***** dept.

I have been a client since the Barclay's days. A *****ulent transaction was allowed through my credit card on 11th April 2024 for an amount of R19560.48.This was processed without any request for approval on the app. I reported the transaction as *****ulent immediately both on the app and to my private banker. R18444. 50 was refunded, but the shortfall of R1115. 98 was not paid due to exchange rate difference. What has this got to do with me? The bank allowed the transaction to proceed through there own fault. After many emails and conversations with my private banker, it's now nearly 7 months and there is no solution. I am at the point of closing my accounts with FNB after 50 years as a client.