If you would like to cancel an invoice you click on the three dots in the overview and select 'Cancel invoice'.
Here it is important that you state a reason why this invoice is cancelled - e.g. 'wrong invoicing'. With 'Cancel invoice' you will confirm the step. In the tab 'Payment status' the notification 'cancelled' will appear in the status 'paid' and the amount will be removed from the turnover.
Please note that you must manually refund the products that are determined as services. Only single tickets will be refunded to your customers automatically.