Bajaj Finance — Personal loan calls from Bajaj finance

Dear sir/madam,
I have been getting 10 to 15 calls daily from past 1 month from Bajaj finance offering me personal loan. I have told them 1000 times that i don't require any personal loan, if at all i require i will definitely contact you. But still i get calls from them and i have also told them to delete my number from their call records. But they haven't done that and i am really frustrated by answering their calls and telling them the same thing every single day. Kindly help me in this regard.