Officialicloudunlock.co.uk is a scam. I am a professional Apple technician who decided to run tests on these "iCloud unlock services. I purchased their services for my iPhone 6 (which I know is not blacklisted) just to see if they could remove the lock. I spent 20.99 pounds for what was supposed to be the service, but shortly afterwards received an email from them saying that "I had payed the initiation fee" and then they asked for an additional 14pounds. Just to humor them I paid them and for about three days their service tracker showed progress, however on the fourth day I received an email saying my phone was blacklisted. Now I'm no genius (no pun intended due to a career with the genius bar) but the fact that my iPhone was blacklisted means that I reported it stolen which I would obviously not do. I emailed them saying that it was not blacklisted. Stephanie replied saying they needed a blacklist report. I sent the report and never heard from them again. I have sent the report eight times. Even though it was a curious test I know that for most of you it is not and you don't want to lose 34.99 pounds (about $60) and get nothing. Now I'm sure that they occasionally unlock a device to remain "in good standing" and get good reviews, but the temptation to "fail" a few unlocks is high, seeing that they can get close to $60 without spending a dime, and there is nothing the buyer can do to get his/her money back, because the payment is made through Nochex which does not offer a period of grace like Paypal for the buyer to ensure that his/her order is carried out.
Note: I had a similar experience with iphoneimei.net so don't use them either. If I were you I would not pursue locked phones because you will end up with a $60 loss and a phone that is worthless.