Tata Sky — No signals around 10:30 every night

Address:

Mumbai City, Maharashtra

My registered mobile no with Tat Sky is [protected], For a last few days my connection shows no signals at particular time of the late evening. I have complained several times. The company promises to send engineers who has turned up only twice out of about ten complaints. He has not been resolved the problem. He toyed with the idea of changing a switch. However, if the switch is faulty, how come the TV is working during day time? My problem continues with the company turning a deaf ear to my complaints.