Bajaj Finance — Do not disturb - stop promotional calls from bajaj finance

I have been receiving too many calls annoying promotional calls from Bajaj Finance. Though conveyed several times that I am not interested in loans and other offers, I have been continuously receiving calls. I had also raised my concern in one of the calls and asked to mark in DO NOT CALL list, but no difference.

Please do the needful so that I do not get any more promotional calls from Bajai Finance any more.