Reliance Bigtv — not installed big tv connection after expiring 50 days

I applied for rbig tv on 1/3/18. My booking id is 12511283 by paying 499 as advance, i got a message saying connection will be done within 30-45 days. But not installed the dth so far. I have complained several times. No reply received so far. I complained over toll free number several days. Each time they say connection will be done next day. Past three days only busy tone hear from toll free number. I heared several customers have the same problem. I want to know wheter it is a big cheating programme by reliance