Nesle Dolce Gusto combo deal no stock

Wanted to buy a Nescafe Dolce Gusto ( Combo deal) and at first they don't know what I was talking about. I had to show them there own adverti*****ts. They suddenly declare it was out of stock. There were no indication on the shelf that they even had stock before . I would understand if I find an empty shelf where this item were supposed to be. They ( the salesman and clientservice manager was not interested in helping either indicating if I can get it at another store or if when they will have stock again