Tata Sky — No signal/Without network

I'm Loui Martin, Tata Sky Consumer ID NO. [protected] from Ambernath (East) in Thane (Dist.). My Tata Sky network is not working since 4th April 2015 and a complaint was lodged on the same day. Complaint no. is[protected]. Since then twice messages were sent that "Technician will visit" yet till date no technician has visited and rectified the problem.Today its the 21st day of my complaint. Further, on telephonic enquiry, no convincing reply was given. Kindly do the needful as early as possible.