Why do errors occur during bookings or cancellations? What's the best thing to do if this happens?

Occasionally an error does occur during the booking process. There are various different reasons for this, e.g. your Internet connection is unstable, there aren’t enough funds to cover your method of payment, or there isn’t a shuttle available nearby. The hvv switch app will give you an indication of the reason in the respective error message you receive. Please contact hvv switch customer service if you can’t resolve the problem.