Bad customer service for return goods

Hi <br> <br> on 29 August 2015 my husband and I went to Southgate mall purchaced infacre formula we were looking for 2 boxes there was only one in the shelf my husband then asked for another box from the warehouse and the marchindiser brought it. the evening we got home while preparing for the turns out the milk is sour. Yesterday we went to trade route mall in lenasia which is much close just to swop it out got there had a slip stamped and signed at Southgate mall. the guys at customer service refused to take back the formula send us back to southgate i dont understand why it is still the same STORE! we were told that because it is formula they cannot return it at their sores I dont see any policy such as the one that we have been told on your website i need some clearity this is what you website says not me see below:<br> <br> 3. Guaranteed service on every product sold<br> <br> We will have any item under warranty, repaired for you - should that take longer than 21 days, the item will be replaced or refunded. For warranty purposes, proof of purchase is required. We also ensure ongoing service on any product bought from Game even after the warranty expires.<br>