Property registration cancellation

Respected Sir/Madam, I am from warangal, owner of 200 sq yards property in warangal. out of 200 sq yards i have built a house in 100 sq yards and the rest was empty and as per my father request i have asked my parents and brothers to stay in the rest 100 sq yards and no documents was signed in any manner. My parents were expired and i asked my brothers to vacant my place after they are settled for this we had a document (notary) signed for 10 years. One fine day i have got some information from a known person from the local muncipality that they have got the house number on the empty 100 sq yards for which they are staying. I have been to local Municipality to enquire about the unauthorized house number they asked us to check the mutation details throught RTI act and we got that information as no evidence can be traced. We have tried giving complaint to the additional deputy commissioner of the Municipality and he was so rude and answered me that they have got this number long back. But i was wondering how they have got this number without any document. I am being the owner of the land with all the proper registrations and even the EC is on my name for my land but how come the muncipality has given the house number to them. Please suggest me what can i do to get my land legally throwing my brothers out. I have asked this to mu brothers now they say that they are the registered the 100 sq yards with the help of house number. This registration was happend in the month of December/2016. Please advise. Regards, Rajkumar 9908969518