iphoneimei.net is SCAM service. First when you entering your imei number they says icloud Unlock is possible then ask you to pay 19 pounds then they says OK we checked your imei number unlock is possible please pay 30 pounds in addition. Then on 3rd day they says that your imei number is blacklisted and not possible to unlock and suggest you to use premium unlock service which will be available shortly and "refunding" your money to your email as a voucher for their "services" (lol)
This is not only scam this is real online criminal activity why UK or US cyber security authorities are closing their eyes to this criminal? May be they has special "subscription" from their services... corruption everywhere...