Horrible service Game stores

On the 10th of January I made an online purchase on game store app. The item purchased did not show that it was out of stock. As per the app delivery was suppose to be on the 17th January. On the 18th I called customer care to check on my delivery I was advised that the item was at the warehouse. On the 19th noon I called customer care again to check on the delivery,i was told the item is out of stock.(shocking) I asked when they would have stock no one knows (if game doesn't know, who suppose to know) I asked if someone can check and advise on availability of stock, it is now 18:00 nobody has called. Horrible service from Game stores