Idea Cellular — Fake number on my name

Address:	411038
Website:	www.ideacellular.com

A few days ago I received a call from [protected] (Executive name: Ria More) Saying that this is a call from Idea Gallery Thane, Mumbai and she was enquiring about the numbers I use from Idea. Wherein I informed her that I am NOT an Idea customer but arguing she said that the number [protected] is apparently in my name i.e. Vinay Suresh Babani and is having some amount due which I need to pay.

Today, I get a mail from [protected]@idea.adityabirla.com with a subject 'Demand legal Notice! Idea Cellular' (PFB the mail)

Now I would like to request you to confirm the numbers and email id and user of those number as I am not using [protected], Neither have applied for any Idea postpaid connection in my life.
Below are my questions for Idea Care:
Is the number ([protected]) & email id ([protected]@idea.adityabirla.com) real?
Is the number [protected] on my name i.e Vinay Suresh Babani? if yes, then how do you even start the number without physical verification as I have never verified or applied or used the same!
Expecting the reply at the earliest.