You can close your account by writing us an email to firstname.lastname@example.org.
It would be awesome if you could let us know in your email why you chose to close your Vantik account and add eventual points of criticism. Your feedback is very important to us, because based on it we can improve and work on our service.
Instead of closing your account you can also pause your savings rate indefinitely and pay out what you've already saved up free of charge. And when you decide to start saving again, you can easily continue.