Go to App store -> click on your details (right corner) -> click on your Apple ID -> “Subscriptions” or “Contact Apple support”.
Go to App -> click on Settings icon (right corner) -> click on “Account” -> scroll down to “Manage subscriptions” link and edit your valid subscription settings.
Go to paypal.com and log in to your account. Click the Gear icon in the upper right of the screen, choose “Payments” -> “Manage Automatic Payments”. Find “Master Home Security s.r.o.” in merchants’ list and click the Cancel button.