Bad taste

Hi there<br> <br> I bought a Black Cherry Fruit Yoghurt from Checkers Durbanville at approx. 13:00 on the 17th April. <br> <br> It looks fine but there is a metal like taste in the milk.<br> Now i'm not sure but I've never had a taste this bad from the yogurt. <br> Expiry date: 24 April 2015 but i'm not sure that's correct. <br> <br> I also bought a choc chip yoghurt in the same purchase and there are little white blobs in it.<br> Expiry 1 May 2015.<br> <br> Could you please investigate?<br> <br> It could perhaps be a after delivery storage problem?<br> <br> I dont want to keep wasting money on unsatisfactory product.<br> <br> Thank you