Sad Makro client

I would like to express my bad experience I got from Makro Centurion today , I went into the store did all the shopping I needed , an hour later after the teller cashed all the items , I am advised that the gift cards are not working and it is Thuthukani's problem not Makro's problem, first I was sent through to client services, then sent back to the teller, the supervisor came and just said gift cards not working , I went through to the manager and she echos the supervisor, I asked so you let your clients spend more than an hour in your store only to tell them you cannot process transactions at the end? why not notify us when we enter as the manager has stipulated they have been experiencing the issue all day , and announce/ remind us that there is a persistent issue so that we can make a decesion to stay or go home and come back another day, and for the manager to say its thuthukani, not Makro ..well the card says Makro and i am a Makro client not Thuthukani ...she make it a point that ownership is not taken by all means necessary ......i guess i am just a small fish in big sea and my few thousand rands are not going to dent their business ...my time is worthless