If you have purchased the game via steam or website but have not received the e-mail that contains a link to confirm correct e-mail submitted during registration.
Some users may receive e-check instead of package activation confirmation to the e-mail.
Example of an e-check is below.
In this case, you will see "BUY" button instead of "PLAY" in Launcher but your payment was successful.
If you haven't received an email with the key, please submit a request titled "Confirmation E-mail not received". You will receive a key from CS agent for further activation.
The key may be activated here - https://play.lifeisfeudal.com/redeem.
Below is an article with step-by-step instruction how to use the key that will be sent.
Sorry for inconveniences caused and thank you for your cooperation.