C***** classic low fat dairy snack

I have bought 4 packs of c***** classic yoghurt dairy snack. However, they taste really awful and sour. They leave a bitter taste on the tongue. The yoghurt have two colours inside, yellow/cream and pink for strawberry flavour and cream and pink/purple for mixed flavour. Expiry date is the 16th May 2021 but something is really wrong with those yoghurt. I bought them at Checkers and they colours and I assumed they're new flavours. The berry flavoured has blue and purple colour. What a waste of my money! Having tasted the yoghurt with my family, i hope we will not get sick. At this point I know that they are not edible because of their taste!