Building sales on lies

I got a call today from +***, I guess it was one of their consult. That guy said he was I was being over charged and they wanted to help me. He already had my date of birth with him, wen he said I should confirm if it was right then I hung up. Because I didn't want their help I can manage my debt. I was busy at work, now I just got home and I see they sent an sms confirming that I gave them to request to obtain my credit report which I didn't because I can do that myself. The sms they sent also has my ID number. I didn't request anything from these people.