Proper version of M&B warband

[Wun_Wun]

Hi all, I am sorry cause maybe posting this in wrong place, but where to download proper version of mount and blade warband v1.168. I downloaded in TaleWorlds but I cant find serial key, every key that I put, says DENIED.
Help me please, so I can play this fantastic mod. Its the best GoT game ever. Thanks

[ZeR0W1]

You need to buy the game. The Best way to do so(for me) is on steam.