No one said the authorities "green-lighted" anyone, however they were made aware the lock was cut off, nothing happened in regards to that and there are no other legal access points to this property, without the easement the property is land-locked.
Oh great. A self-help remedy. Now you're adding to animosity between the parties, and
you still haven't solved your problem.
The problem is that you believe that you have a valid easement,
and the other party thinks you don't have a valid easement.
You have changed no one's mind. They can go buy a stronger lock, and fume about how you are the reason the need to get a new, stronger lock, but they certainly are not thinking, "Hey, gsgrl2000 is right, I should stop being so difficult."
You've tried to have a calm, rational conversation about the issue, right?
You've made sure that the other party has copies of all the relevant documents that you believe help to shop that you have a valid easement, right?
And of course, when the easement was blocked, you requested in writing that the obstruction be removed, right?
Then really, the only remedy is court.
Stop fanning flames, and get a real, enforceable solution.