Creating obstruction to reconstruct some part in my home.

I have garage in my some part of home in one side. after that there is big open land for a person.actually when i reconstruct home specially garage,the neighbor fellow is creating obstruction with the support of polish station. i have done demarcation from block by co order,in which my land is clear.and other party also done demarkation by the sdo order in which my land is clear. but when i start construction polish station said that party lodge a complaint against you,so you have to stop the construction till co measure that land.i have give application to the co and after investigation they have given me a order copy that you can start construction,no body can stop it. i have given given application with order copy to the police station and start construction. but again police station is stoping my construction saying that the party given application to the co office. i have quiry that:- co office saying that after demarkation done by both party there is no scope to measure again,then why my construction is always stopping by party with the help of police station. i am having lots of mental tension that where to complaint,because i have heart from other source that party have spend money for stop my work and required money from us to start the job.he is a very wealty people. for stoping my job they have alredy send some local criminal when i was started. i have all the papers but not able to do any thing can u suggest the right way,becuse i dont want any type of sqabble.