Tata Motors — Scam calls and wrong registration of number

I have been constantly getting calls and sms from Tata Motors on purchase of car, I believe someone else had made the purchase and my phone number got linked to that purchase. I have made this clear everytime I receive the call from Tata Motors, but I continue to receive calls and sms. I have attached the details of sms and it also mentions the car number. Please do acknowledge and take necessary action.