fnb You are ****** please reverse my R1000 plus the amount you charged me for honoring the last R500 transaction

Good day,

On the 17th of July i had no funds in my bank account but FNB allowed a transaction of R500 from Afristay booking to go through, My account was then on minus plus FNB charged me a honoring fee. I just want to say that this is not acceptable I logged a dispute and there is still no feedback. There are 2 transactions of R500 from Afristay that i want FNB to reverse because i cancelled the booking and the guest house confirmed that the booking has been cancelled, i also sent FNB the terms and conditions of the booking yesterday but have not received any feedback since.