Purchases through lottery

Summary: The discussion topic introduced by decassi92 was titled "Acquisti tramite lotteria," but no content was provided in any of the messages.

Good morning, I’d like to have more information about how customer support works in the case of a sale organized through a lottery. Let me explain better: I found an ad in which a card of value is being sold through a lottery system. The user created 20 packs, specifying that the card in question is inside one of them.

I would be interested in buying all the available packs to make sure I get the card. This method is clearly described in the ad. My question is: if I bought all the packs and did not receive the indicated card, what would be the procedure followed by customer support?