Maharashtra Natural Gas [Mngl] — non connection of gas pipeline after paying deposit 6000 on 26.7.17

Sir,
I have paid amount of rs 6, 000 for pipeline gas connection on 26.7.17 (Receipt is enclosed) but yet today there is no connection.
Your person mr vinay & one more person came to my house & did half work (Photographs are enclosed) even that work is also not done properly. Ur official can visit to my house. What they have told that required drill was not with them to drill my marble otta on which my gas hub is fitted. U just comlpete the work on urgent basis or return my deposit with interest @12% along with compensation for damages done to my kitchen wall. See attached receipt & photos. My contact no is [protected]