Municipal Corporation Of Delhi — unauthorized construction of building

The house no o[censored]nauthorized construction is d-144 nehru vihar delhi 54, i have already registerd a complaint but no action has been taken, its been 2 months, but no officer has come once to check the property, the builder is taking the land of street also to expand the house, i have registerd the complain 2 months back, mcd office knows about the complaint, builder has been called by the department but the builder has given money to the officers and officers havnt come to check the property once and the complaint remained unresolved, if i dont get any positive response from this complaint, i will go to the higher authority to seek the help
Please take necessary action as soon as possible