More information would help. How did you block your iCloud? Error message(s)? Did you enter the wrong password too many times? Is your Apple ID disabled?
Apple ID is locked or disabled
If necessary, there is a contact link.
Apple Support by e-mail or chat Select your device, Battery, Power and Charging, then Power adapter not working to get a chat option. If you need to talk to them, ask them if they will do a Skype or FaceTime with you.
Or fill out and submit this form.