If you purchased a subscription in the Android app via Google Pay, or in the iOS app via Apple, your subscription will automatically renew. If you paid via the Howtotalk website, your subscription will also automatically renew, unless you specified otherwise. To check, go to https://signup.howtotalk.nl/account and choose the login method you originally registered with (i.e Google, Facebook, Apple ID, email.) If you registered via email, you will receive a magic link to your inbox with a link you can use to log in. You will then be taken to your account page where you can manage your subscription.
Note: If you enter a different email address than the one you signed up with, that account will be registered as a new user.