Hi @Anonymous User
You could try nowtv live chat, where they may ask you for the serial number of the nowtv device that came with the voucher scratch card (if applicable) and may ask for a copy of the receipt.
They may also refer you back to the Retailer where you purchased the scratch card from for a refund or replacement.
Link to live chat here.
https://help.nowtv.com/contact-us/managing-my-devices
