Bajaj Finance — Bajaj Finance promotional calls

I am receiving multiple calls from Bajaj Finance office Pune, I have requested the customer care people and their managers to remove my number from their list as I’m not interested in their promotional offers, credit cards and loans. Even I have registered for DND, but still I’m receiving calls from them and the frequency has increased after making requests. If the call is not answered then I’m getting multiple calls, the harassment from Bajaj Finance team has increased a lot.
Please look into this issue