Common Passage Issue.

I have a piece of land 'A' adjacent to a Common Passage (CP). It is clearly mentioned in my land map and deed that Plot 'A' and Plot 'B' are adjacent to a CP. The said 'CP' is not used by me until now because I have my Easement road in front of my plot. But now I shift to the new building which is behind Old building and I want to use the 'CP'. But a third party called Plot 'C' which is situated far behind my plot is restraining me to use that 'CP' as they are claiming that the 'CP' is there own passage and they have sole right to use the CP. 1) The said 'CP' is also used by a Six storey Apartment which has nearly 30 - 40 family and other houses behind our plot. 2) The electric supply company had built an underground 440 cable line under the said 'CP' which is going to the Plot 'C', the Apartment, and to the other houses behind our plot. 3) The municipality had built an underground water supply pipeline under the said 'CP' to supply water to others. 4) The municipality had made a Concrete road on that said 'CP'. 5) Nobody has any objection against us to use the road except the plot 'C'. 6) The residence of the plot 'C' have 'Aggressive' behavior to us and use 'Offensive' language against us. 7) The previous time we had filed a Sec' 144 against them. I am a law-abiding person and have the utmost confidence in the Law, please guide me what can I do now. 4) Municipality had made a Concrete road on that said 'CP'. 5) Nobody have any objection against us to use the road except the plot 'C'. 6) The residence of plot 'C' have 'Aggressive' behavior to us and use 'Offensive' language against us. 7) Previous time we had filed a Sec' 144 against them. I am a law abide person and have utmost confident in the Law, please guide me what can I do now?