Yes, it is fraud to offer to sell one thing, take customers' money, then actually sell them something lesser or different. If you paid for this pack and got other than what you paid for, you could sue the company to get your money back--though whether doing so is economically worthwhile, especally if the company is not located in your county so that you could not sue in small claims court as your own attorney, is debatable.But in your question, you also describe this as a "free pack": if the pack itself was not paid for but rather is some premium, gift, or promotion the company gives out to players who bought the game generally, but who did not have to buy (pay for) this pack, then you would have no recourse: you have no right to any free gift, but only get what the giver chooses to give you.