Menlyn Park Shopping Centre Gift card not working at Checkers

I received a Menlyn Park Shopping Centre Gift Card for my birthday from a friend. Today I went to the Checkers in Menlyn Park Shopping Centre and selected items to purchase. All the items were scanned and I presented my gift card for payment. The cashier informed me that the gift card from Menlyn Park Shopping Centre does not work on their system. I could not understand, because I never had a problem like that in previous years. I spoke to a manager and he just apologised. I was upset because Checkers had no sign anywhere stipulating that the gift card won't work. Checkers told me to resolve ithe issue with Menlyn Park Shopping Centre. When I spoke to the employee at the info / gift card counter I was referred back to Checkers. They told me that this issue has been unresolved for 3 weeks already. I went back to Checkers and the manager insisted it is not a fault on their side but Menlyn Park Shopping Centre's side. I was humiliated and wasted my time and parking money because I had to leave empty handed. Neither Checkers nor Menlyn Park Shopping Centre took any responsibility for the gift card that was not working. Neither Checkers nor Menlyn Shopping Centre could tell me what the problem is. Checkers should have had a sign up to stipulatie that the Menlyn Park Shopping Centre gift cards does not work in their store. I would not have wasted my time if I had known. I also think they could have resolved the gift card matter if it was a priority for them. They have known about this for 3 weeks already but I guess a few customers wanting to use the gift card are not a priority and we are easily sent away empty handed. It is also Menlyn Park Shopping Centre's responsibility to make sure that when they sell a gift card it can be used in all the shops in Menlyn Park Shopping Centre. The gift card that was given to me for my birthday should have brought me joy but in the end I was humiliated and had to leave upset without getting anything.