FNB ****med me!

I made a purchase to pick n pay asap using my FNB banking app on 09/11/2024. I transferred money from my savings account to my cheque account yo accommodate the purchase which cost R294.97. The difference left my account, I also purchased 2 betway vouchers which cost R40 and I was left with R28 in my account, I then transferred money again to purchase food at work which cost R65, I made another purchase of R36 and another of R20. All this money left my account. I checked my transactions on tuesday 12/11/2024 only to see that the refund I was waiting for from shein listed and that the above transactions which I had already paid for were deducted from my shein refund, they were dated the 12th and I was told that even though the money left my account because the merchants only banked the money on the 12th the pending transactions were paid for with the Shein refund. I have reached out to multiple departments regarding this and I have not received any assistance. I was also referred to my November bank statement knowing very well that I do not have access to it at the moment. This is day light ******* I have been hearing a lot of people complaining about these pending transactions even though the payment has been made!