Govt employer not giving HRA and forced to stay in Govt quarter

Hi, I am currently working in India Govt Mint, Kolkata. I have completed one year of service in this organisation. I have two questions please help me on this .. 1.In my offer of Appointment letter it was mentioned that " working hours will be 48 hours/week i.e 8 hours per day with 6 days in a week and you will have no claim for overtime hours and incentive etc." -- but my office forcing me to work 8hrs 30 mints without any reason and they also telling us to extend my probation period if we dont work extra 30 minute. 2..In my offer of Appointment letter it was mentioned that " you will have to stay compulsorily in the company residential accommodation as per entitlement.However if company accommodation is not avail or not provided for any reason then only HRA may be sanctioned on certification by the Estate Officer " Now sir my 2nd question if I dont need accommodation then how can my employer force me to stay. The condition of the residential colony is just equal to hell ! No maintenance work happens in the colony. we dont get even proper drinking water. I have written letter to authority but no action has been taken .. So i would like to get some legal advice on these matters.. Thanks in advance ..