The scam company IPhone Unlock UK uses NOCHEX for their merchant provider. Go to: https://support.nochex.com/kb/faq.php?id=230. Explain your situation and they will contact them on your behalf. DO NOT fall for the voucher. It is a scam. They will send you automated emails no matter what you put in your email. Their services do not work so go to the website and see if you can get your refund. If all else fails, go to your bank and file a claim.
Hi, sorry to hear that you are not happy with the service that you received, I can assure you that our site is not a 'scam' as you put it, the website has been in business for over 8 years and we have unlocked thousands and thousands of devices. You only need to see other review sites for legitimate reviews about our services.