We do not accept invoices that contain returned or exchanged items. Since retailers process returns/exchanges in different ways, we're unable to guarantee that these invoices will satisfy tax refund rules.
If you want to return/exchange an item but still want to claim a VAT refund on the items you're keeping, you'll need to return everything and repurchase to get a new, clean purchase invoice.
If you think there has been a mistake or you have any questions, please contact our customer support team through the in-app chat.