Bajaj Finance — marketing calls / sms to avail of personal loan / cibil score

I am often receiving marketing phone call / message to avail personal loan, offers on consumer goods etc.
These phone calls are very irritating, and create a disturbance, and are very annoying, also when a particular phone number of received call or a series is blocked / blacklisted by me, they start calling from different number.

They do not value the customers time privacy / value and seem to be unethical in trade practice.

If in case i need any loan i shall contact / walk in to their office. Why do they call / message me, are they over flooded with money.