damaged ice cream

Recently I purchased 3 boxes of ice cream from checkout in Phoenix. We opened the first one and had it an it was OK. The second 2 boxes w opened as we had guests over and still have part of the 3rd box. The product in the box has a sandy taste. Like a rough texture. I have misplaced my til slip as nobody really keeps slips for food. Clearly this product wa not up to standard. I wonder now if that supermarket has purchased good product from you guys or from someone else. I have since bought nestle ice cream which is of a far more superior quality. Could you kindly resolve this issue as I would hate to think that you make a product inferior to nestle as I started liking ola because of milky Lane.