Delta Airlines pending payments

I paid for a plane ticket using my Discovery cheque card on 11 August 2024 for the amount of R27,269.30 with Delta SA Airlines. The initial payment attempt was unsuccessful, but the second attempt was successful. However, two days later, I discovered that the first payment had also been processed, resulting in my account being overdrawn and subsequent declines at other transactions. Delta SA Airlines is unable to assist due to their protocol and has not made efforts to resolve the issue. Discovery Bank, which has full control over my account, has not been able to decline the duplicate transaction due to insufficient funds, despite the fact that such transactions should typically be declined if there are no available funds. I am deeply disappointed that modern banking technology cannot rectify this issue promptly.