You can change the order at any time in your personal account — even during execution. For example: it started raining and window washing doesn't make sense — just go to your account and remove window washing. The sum will be recalculated immediately, for example with card payment after order completion the correct final amount will be charged. In your personal account you can also change the payment method — for example, set a card instead of cash or vice versa. You can do this before, during and after order completion.