Hello Diwash. If this is your aunt's iPhone, then you need to tell your aunt to call Apple, prove them that he is the original owner and they will help him remove the iCloud Lock from that device. If you cannot do that, I am afraid that there is not an iCloud Unlock service available.

Yes there is you just have to do the leg work and look for ways to preform it. Apple dont want you to know that there is because then it would destroy them. My ex husband bought me an iPhone off a sales site called Craigslist about 6 years ago. It was an apple iPhone 5. Completely locked. It took him 3 days worth of lunch breaks to crack that IPhone 5 and it was done and I used it for the next two years with no issues what so ever so i know for a fact that it can be done. You just have to be persistent and patient and dont give up. Theres a ton of options out there. Hint: Google it under encrypted search. (Private Search) see if that helps