Poor customer service at Woolies after buying inferior quality

I bought a bottle of grapefruit juice at Woolworths Southdowns (Centurion) on Friday 23 October 2026. The "sell by" date was 23 October 2026, and the "use by" data was Monday 26 October 2026. On Sunday 25 October 2026, I opened the bottled (stored in the fridge) and upon pouring, it is clear that the juice has started fermenting in the bottle as there was excessive gas bubbles present. This is a non-carbonated juice. On inspection, I could see bubbles in the bottle rising from the bottom. I took the bottle back to WW Southdowns, and spoke to the manager on duty, Tshepo. His responses was that he could not exchange the bottle, as the condition on the back of the receipt clearly says it cannot be exchanged after the "sell by" date. I bought another bottle, and there was none of that mentioned condition on the back of the receipt. I called Tshepo again, and after reading the back of the receipt, he admitted that his previous feedback was incorrect. He still maintained that he is not going to exchange the bottle, because the sell by date has passed. I highlighted that is was still withing the use by date, and only opened on 25 Oct. He refused to exchange. Why then print a "use buy" date if the product is going to go bad on the "sell by" date? Shame on Woolworths Southdowns. All you had to do was to exchange your poor quality product. Shame, shame, shame.