Have you tried turning on DND on your phone number? If you receive unsolicited calls / SMS after enabling DND, you can report the caller and SMS host. DND registration and complaint submission both can be done through SMS but TRAI also offers Android app and iPhone app for convenience.
If you report a call / SMS, the operator will get back to you with a resolution within 72 hours or so.
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super fast news and good step have taken by Indian railways. today if i compare with previous railway minister..Mr. suresh prabhu have been doing good job. thanks for irctc