State Bank Of India [SBI] — Harassment calls

Address:

130-C/3 GAUTAM NAGAR

This lady from SBI who's name is Beena Sharma is harassing me and my mother including all my family members for the dues of Rs 2 lacs which i have not even taken so i have no links with SBI or HDFC but it's been a year they are continuously threatening me that they will see me very soon.
I don't have any account with this third class SBI.
This insane lady called my mom who's a senior citizen and abused her with different numbers she even harassed my cousin and before this their agents take a picture of my whatsapp DP and send it to me then they take out a picture from fb and send to me.
Such abusive language !
Are these ### allowed to use such illegal steps to take out money.
I am filing a case against SBI tomorrow for the mental torture i have been going through these two years when i don't even have any account with them so how am i liable to pay.