Cadbury dairy milk - Cadbury dairy milk roasted almond was rotten

I bought cadbury dairymilk roasted almond from nearby store. The packaging is absolutely fine and the expiry date on the product is of ****. But the product was not in edible form. The chocolate bar texture was grainy instead of a solid bar. Upon eating it also, the chocolate does not have the iconic cadbury dairy milk taste.The almonds raste bad. I have been consuming cadbury's products since childhood but this time i can surely tell that the taste was very different and that too not in a good way.There were two shades of color in chocolate bar.