I ordered a product that had a super price (3144 R...

I ordered a product that had a super price (3144 RON), was taken by the sales agent, I thought everything would be ok and after two days they give me a message that they canceled my order because that product was not in stock, although it was found on the site at 4133 RON. I do NOT recommend ABSOLUTELY at all, I lost time because of these people and I canceled other plans just to find another product.
LATER EDIT: I was confirmed by the lack of professionalism of this site. I was called by a manager of the company and was told that when I placed the order that product was in stock from the supplier but at the time when it had to be processed it was gone. Can this be something? How not to guarantee the orders already made? Big logistics problems suppose. On other sites you CANNOT place an order when the product disappears from the stock, you place the order here and only after checking if it is in stock (or, in fact, the stock update takes two days - instead of a few hours to get it say it is not available). There are always excuses and motives in this country instead of taking responsibility for our actions; I was sure that nothing would be resolved after talking to a manager.