Advertising Stock Online and In Store that hey have not received

I was at the Woodmead Makro on 14 October to purchase a PS4 disc, I checked online and it stated that it would be available on the 13th. When I got there the cases were on the shelves but when I went to check out they informed me that they don't have it, I asked for the manager and after waiting 30 minutes he showed up and informed me that they have not received it in, when I questioned how they can put it on the shelves and not have it in stock he shrugged, he took my name and number and promised that he would phone me the next Monday and he would be able to provide it to me at a discount. Shockingly to this day I have not been contacted (not that I had a lot of hope for it), I took the managers name at the time, but to be honest what would it possibly help, I have received the similar pure disregard for their clients before.