Bajaj Finserv — harassing customer

I had a emi card delivered to me by them. I used the card to buy an a.c. I have never defaulted in any payment to them. Immediately after swapping of card they started asking for extra documents. They were handed to the seller. very next day onwards i am being hounded by calls from them to forcibly buy insurance. Today a person repeatedly called me from [protected] and invited himself to my residence representing himself as from bajaj finserv tried to forcibly get me to sign blank ecs documents. When i refused to sign the documentd tried to treathen me. I a lady am made to suffer insults as well as being stalked for no reason at all. i have paid fees gor credit and also going to legally repay loan Bajaj finserv is illeageally harassing me with first issuing card andbtrying to extract illegal money.