Greetings Admiral!
Apologies for the inconvenience caused.
Refunds are handled by Xsolla, you can contact them either by 24/7 live chat available at help.xsolla.com or email support@xsolla.com but first lets try to solve your problem, please clarify the following:
1) Are you running the game via Steam or a separate launcher provided by Xsolla (if you can't find your Steam key, please contact me on ink@navalaction.com from the email that was used to purchase the game).
2 What are your PC specs? (CPU, video card, memory etc.)