Neighbourput has constructed vent facing into our property and refusing to cover it

Hi All, We have a plot in the residential area and we have neighbors in all surroundings as well (meaning, we have neighbors on the left, right and even on the back side of the plot). We have constructed a boundary wall with Gate on the front side, just to keep the land safe from animals, and to ensure clean environment for all beings living in and around the area. But, we didn't get a reward for our good deeds. One of the neighbor (located on the left-hand side of plot) had constructed a 'vent' in their boundary wall which faces our property. This was done without asking us or without seeking our agreement. Now, we requested them to cover that up as it's causing hindrance to our Privacy, they didn't like the idea and threatened us, by asking not to cover it at all ever. With sources, I got to know that he is an executive in some court and knows a lot of influential people. However, this is not a concerning thing for me at all. Since, discussion is not helping me there, therefore, I am seeking legal advice to send him a notice to justify the construction. Per my understanding, 9 out of 10 neighbors would not want venting directly on to their property (mechanical or passive) and I am one of them. Can I deserve the right to close the vent from my side by giving an advance application to the appropriate authorities? If yes, the authorities shall include Nagar Nigam or someone else. Moreover, opening up a complaint in http://jansunwai.up.nic.in shall serve the purpose or not. I am sure that there are laws under which direct venting is not allowed but unaware of the same. A legal advice in this regard will be highly appreciated.