Bad customer experience

So we bought the Stanley duplicate cups from your Stellenbosch store in December for the kids. There was no straws in the cups and the lady signed on the slip for us to collect at any time. Today I went back for the 3rd time since the purchase only to be told now that they don't sell it without the straws and they will not be getting stock or straws again. 3 extra visits, now being told I have to take the cups back to the store and they will refund me, requesting me to visit the store for a 4th time. They want me to take the gift given to the kids back and now I have to go search for replacements. This is leaving a very bad tast in the mouth, the worst customer experience in some time.