Yougurt sour!!!

On Saturday afternoon the 10th October 2015, I was shopping at Checkers Windermere centre. Amongst the items I purchased was crystal valley yougurt, the expiry date reflected on the yougurt was 25/10/2015.<br> <br> I returned home packed the yougurt away in the fridge, proceeded that eveining to have a yougurt after supper, the yogurt was sour and the smelling quite fermented. The appearance was lumpy instead of being smooth as the advertied on the packaging . I am quite appalled as the expiry date was still a further 15 days from purchase.<br> <br> Some check should be in place to ensure goods are indeed okay to be on the shelves and sell by date should be looked . Very dissapointing to also notice so many complaints about the same brand on this site.<br> <br> Clearly the manufacturer is messing up on quality checks.