The easiest way is the confirmation email you receive right after booking: it contains direct links for payment, changes and cancellation, so you don't need to call anyone. The same booking is also visible in your personal account.
Cancelling or moving a visit is free up to twelve hours before the start. That is not a formality — the route for the next day is planned the evening before, and a last-minute cancellation means the cleaner has already set off while the slot could have gone to someone else.
If less than twelve hours are left, call the call centre or write to us in a messenger. We will try to move the booking to another time on the same day, which is almost always better than cancelling.
Card payments are refunded to the same card, with the timing set by your bank — usually up to seven days. There are no cancellation fees, and skipping one visit does not cancel a subscription or its discount.