Idea Cellular — No Network since 3 days

Address:

Pride World City, Charholi, Pune, 412105

My phone has no network since last 3 days. Initially I thought that its problem in the place where I was located. But then while I was travelling and I finished my travel of more than 1000km, problem still persists.
I tried to change sim slot, changed phone, did everything that should be done on my side. But still problem is as it is.
More frustrating job is when I call to customer care and request to resolve the problem. They just assure to solve the problem and call back to my on my phone number which has no signal. Whatsapp customer care number send otp on same number which is not operational.
I have no choice other than waiting at this moment.