Cash withdrawn without my knowledge

So I sent cash last week (2 August) using @Capitec's cash send feature. I sent the cash withdrawal details to a friend of mine because she needed CASH. When she tried redeeming the voucher at the ATM, she was unsuccessful. I went to check on my App. Only to find out that the voucher has been redeemed. I followed up with @Capitecbank via phone and was told the voucher was redeemed the same day in Nelspruit. My friend is in Belfast, and I am in Secunda. I don't even know anyone in Nelspruit. And on top of that, I did not send the reference number to anyone, nor did my friend. How does that even happen? I called Capitec to report the incident, and they said they couldn't assist me.