Mysterious charges

I cannot authenticate myself if I make a call to the ***** line form the FNB app The agent cannot hear me make a call to the ***** line form the FNB app I called the Aspire line and they cut the call while I was explaining my problem

I received an insufficient funds message on my virtual card. I was advised to delete the virtual card.

While investigating I found repeat charges of R10 for insufficient funds, but no record of the declined transaction. FNB is charging me for no reason, whether there were funds. As I go back to my transaction record, I find repeats of this. Please investigate and repay me all my R10 amounts