I, Swastik Bhattacharyya, Father’s name- Ujjwal Kumar Bhattacharyya, When I was working at Airtel Company (Year 2015), I used a Postpaid sim which was taken in my documents (KYC) and given by Airtel Company. Mobile number was 8585800739. And registered address was – 4no Kalibari road, Dumdum, PS- Dumdum, Kolkata- 700030, but now I am staying at Sukantapally, Khasjangal, Abash, Paschim Medinipur, PIN Code- 721102, and alternate registered mobile number- 9851008847. When I left the job I returned the sim to  Airtel company authority and told him to close the connection. But I am not using this number, another person use this number month on month. I got bill payment related message month on month to my alternate number 9851008847. Today when I checked through online with otp based I shocked, I have seen registered email id is  badalmohanty12@yahoo.com. And Device name- Huawei E5573s-606, Device Imei number- 866079020892573. Airtel company cheated with me. Why Airtel company has given the sim card to another person without informing me. It was totally fraud (Sim Swap).