The only one able to remove the protection from the phone is Apple. You will have to visit Apple Shop and they will remove it for you. There is no tool, service, Internet website or anything related that you can use to remove the activation. I wouldn't advise downloading anything.
You can start by contacting Apple Support: https://www.apple.com/support/contact/
Note: The unlock process costs almost the full price of the phone or 80-90 % of the retail price.