Faulty Yoghurt

I bought a Yoghurt at Spar and I only opened it few days later, It tasted like petrol/oil. I returned it, they asked me to fetch another one which it tasted the same. It was far from expiry date. They went to fetch different flavours which the problem was with the strawberry flavour. They apologised and remove all from the fridge. <br> <br> I just need to thank them with the way they handled the matter