Everything is fine with me, but I have one question.

Unfortunately, no one seems to have the key, but after browsing the forums, I found that they are being actively traded, and not for much. I think this would be the best option for you. I can't provide a direct link, but I think you can easily find it through Google. Also, as an alternative, you can get the gold version of Heroes, which includes all three parts with the keys. I bought one myself. It will cost around 250 rubles online, and 300-350 rubles in stores.