details thats of a card holder

Dear Sir/Mam
I want to know the details thats of a card holder’s name ,address whose numbers are 9941678699,9884119202.
who is harassig me with a lot of missed calls n messages.
i feel irritated during latenights bcz of his calls and he never attents or speaks when i call! pls help me out to get through this problem and kindly pls let me know who is he?
reply is very urgent!