New GALAXY S3 WITH BOX No service call 07761320547 ?

Hi I bought this phone off someone on gumtree and have found out that it has now been blocked so i cannot no longer use it. I can assure you it was not stolen.The Checkmend report only shows it as blocked it has not been reported stolen or lost. Im selling it at a loss to myself. The phone will funtion perfectly fine in another country Collection from eastham