Expired Formula Milk

<br> I went to Clicks Gallo Manor yesterday afternoon to buy Isomil. I got there and there was only Isomil 1 and one tin left the other number 2 and 3 were out of stock.<br> <br> when I got home I discovered that this one is expired , expiry date is February 2016.<br> <br> I have the tin and slip and want my money back.