Standard bank un-instant money

Very bad experience with this Standard Bank Instant money service. I went to the atm to withdraw instant money voucher. One the first try i received an error that said 'your transaction cannot be completed at this time'. On the second try it told me that the voucher has been used. So i asked the sender to call her bank and told they are having problems with the service and i should go to Spar or Makro. So i went to Spar to collect. Spar said the voucher has already been used. Been on hold for almost an hour with Standard Bank not anwering. My question is why not suspend a service that will obviously cause more faults. That would enable Standard Bank to sort out this mess. Bad decision making on their part.