System crashed

Went to @Home in Sandton Saturday afternoon to redeem a Evoucher, the system crashed while the lady was processing my sale. To say the least I was annoyed that the money had gone off yet I left without my purchase. Such systems are created for conveniency not to inconvenience a customer, the staff looked unbothered and told me there’s nothing they can do since their Customer Service is closed, this is the second time such a thing has happened to me from the TFG stores. Could’ve been that I was undermined or looked down upon?? What a terrible service your staff offers