WoW

Hello i got a problem i bought a program or something i get a rar. file out of it but i can't extract it into a folder with winrar or 7zip winrar just keeps saying it is damaged or something and 7zip says it can't open as archive and that there is not folders inside. I have been watching a lot of videos and searched on google but nothing helps i have tryed to repair it but it doesn't work for this rar. file it is really annoying i don't know what i should say really but it doesn't work (Sry bad ...