HDFC Bank — hdfc loan transfer call nuisance

Address: Bangalore, Karnataka

I keep getting hdfc calls everyday offering personal, loan transfers. And i decline and request them somehow to update their database so not to call me.
Some just oblige and say sure they will update, i know there is no such they can do. But some are rude, they rudely tell you to just say you don't need it.
I wonder where these # get people's contact numbers.
And does it really work to these hdfc #?

Today i got call from this number:[protected] was a really rude lady