Unhappy regarding response

So i bought the special at woolworths 5 juice for R40.00, I then found that a few of the juice was gaseous, but only after my 1 year old had already drank the full juice and my six year old mentioned that there is gas in her juice. I then returned the juice and was given 5 different juice onlly to find that a few of those juice was also gassy, which in my mind tells me there is something wrong because i usually buy this juice for my kids. I then complained to woolworths customer service and they requested a bunch of barcodes which i provided to them. I was more upset about the fact that i have to drive up and down to return juice and that the juice couldve made my kids sick. The response from customer service was that there is nothing wrong with their juice as it was Quality checked, and advised that the only way this couldve happened was if it was not refrigerated after i told them i dont stay far from the store and immediately placed the goods in the fridge. I then rep**** saying im not happy with that response on the 2 March 2016 and to date i have no heard anything. I think this is absolutely pathetic especially from a store as woolworths....