Poor quality

We bought a 500g Milo. once I opened it I saw that the tin was only filled half way. I weighed it and saw that the contents and the tin comes to almost 450g, so that means that even with the tin we were done in, I sent Nestle an email regarding the Milo with photo's and still haven't heard back from them. So we are now paying for a sub grade product as they also changed the formula to add more malt, so less Milo granules and more powder. And now the tins are half full.