I buy The witcher 3 Hearts of Stone using paysafecad and i DOn't have game on my account i write to suppor but i don't get answer so what i can do? And sorry for my bad english :)

First, log in to your web account (not Galaxy) and refresh it using this link. That should update your shelf. If it doesn't work, you will have to be patient because it is the weekend, and even GOG employees have real lives -- there's only skeleton crew at weekends.