Sub zero service levels and not helpfull and ***********

Our three daughters wanted to use their vouchers at the Mooiriver mall branch just now. NB we avoid the mall due to Covid so this required some organization to pull this stunt off. Guess what, the cashier could not process the voucher. She had to search for the manager somewhere in the mall, to help her. This is now after the three little girls searched for 30 minutes to get what they want. So my wife offered to go to the other shops and finish business. After another 30 minutes they returned and still the shop could not process the voucher. Then after another 30minutes i.e. an hour they said my wife must pay cash or come back tomorrow. Is this 1930 or what? Cashier also said its not their problem that they can not process the voucher. What do I tell my three little girls now? Here I'm telling the world what absolute pathetic service they got? I insist that they process the vouchers and deliver the selected items to my house. How can a business survive in this day if they offer this sub-zero service levels?? Contact me on messenger if interested to sort this out.