Vodafone India — my number given to someone else without my permission

I was using this vodafone number for my business only on whatsapp. I removed the sim as i was planning to buy new handset only for my business after purchasing when i inserted the card i was not getting network so i went to vodafone store. The vodafone team is telling me that i didnt use my card for 2 months they gave my number to someone else. I had also linked my aadhar no with it. My customers are complaining that someone else is answering the call. How can you give my number to someone else without my consent? What if my bank account, paytm and other important things are linked to it? Who will pay for the loss?