Unacceptable Service

I tried to purchase 15GB data for R199 through the FNB app. I received a SYSTEM ERROR. I then proceeded to try again and the purchase was successful and transaction paid. I then checked my account and saw that 2 transactions of R199 went through my bank account. I requested a reversal of the one transaction of R199 and was informed that FNB do not reverse prepaid transactions.

I find this totally unacceptable as this was FNB’s error and not mine. I require the R199 reversal to be done.