Bajaj Finance — unnecessary phone calls for loan

I receive calls for a loan from bajaj finance several times a day. I am not interested in receiving calls from bajaj finance. I have told the caller several times not to disturb me and to remove my number from their list. However, nothing has happened and i keep receiving their calls. I do not know what strategy is this. If at all i want a loan, i will surely not go to bajaj finance. Please stop those calls. It is really irritating.