No feedback since April 2015

I complained about yoghurt bought at Hunters Spar Port Elizabeth, it tasted like garlic. I was promised numerous times that I would get feedback about what was wrong with it, as the first agent who contacted me said something about AMMONIA. I mentioned in my complaint that I will never ever buy Parmalat yoghurt again. Well, instead of compensating me for my loss, they sent me a VOUCHER for 2 x Parmalat yoghurts... I do not WANT it. It seems that a generic letter was sent which tells me that they did not even bother to properly read my complaint. <br> I cannot find an e-mail address to contact them. I received the following reference numberS: 15/04/769 and 15/05/605. All the agents I spoke to promised to provide feedback about the product. I need to know what was wrong with it. Please do not bother phoning me and promising feedback, I need an e-mail with proper feedback, no vouchers.