Bajaj Finance — unwanted calls and unapproved money taken from account

Bajaj finance team - you have the most irritating and inefficient crm system ever! From numerous calls to daily smses you have stopped at nothing to ensure i never again transact with your brand. I had taken a car loan years ago, the loan got over some 3 years back and yet i get barged with your calls and smses, inspite of repeatedly asking to take me off your calling list.
To top this nuisance, there was money deducted from my bank account for inactivity on some emi card i did not even sign up for. Stop stealing from people! One - how does bajaj still have access to my bank account after 3 years of loan closure?? Two - i am told by your customer care that i signed up for the emi card. Where is the proof? I did finally get the refund, but it is scary to think you guys can tap into my account without my explicit permission! What is the guarantee that you will not steal from me again?

My lan is 4040cd00367768