Several times I have ordered products on offer tha...

Several times I have ordered products on offer that have never been delivered to me! they were available at the time of ordering, I concluded the purchase procedure by paying and then the next day they report missing goods ...
No advantage is proposed, perhaps for future purchases, to the customer for the inconvenience suffered, ...
some articles I ordered them in quantities over 1, possible that there was not even one? and this did not happen once
But is it possible that in online sales can these games be played as and when they want?