Off ice cream an full ice in icream

I am absolutely dissapointed as I have purchased a 2lt farm house ice cream and a 5lt ice-cream I am absolutely dissapointed with the condition of the cream. The cream was frozen an looks like defrosted an was frozen again. The ice cream had full ice in it an the 2lt was tasting sour. I always purchase farm house ice cream an I'm absolutely dissapointed. I want this matter to be resolved urgently.