I have a one-year subscription with F-Secure and am looking to refund it. How do I go about doing so?
Knowledgebase article about subject:
But, all in all, good to contact official F-Secure Support Channels (for example, chat):
Based on article: if your subscription is pinned to mobile platform (for example, Google Play) - good to ask / check their policy about refund / money-back.