Tata Sky — Showings No signal

Address:

Mumbai City, Maharashtra, 400606

We have two HD set top box now it is showing no signal msg from last one week we already call customer care and request for service, once the person visit but he do not had the part required so the issue was not solved...after that day we contact he many times but he is not cmg we again contact customer care but still waiting for problem solution...plz send your technician.