HDB Financial Services — missed calls

Dear sir,
I previously got calls from some finance bank (Loan recovery) for verification of some guy whom i don't know much. They called me saying my number has been given by that guy as a guarantor, but i make them sure that i don't know that guy and how you can call me directly as i never heard from there side that my name/number has been given or i did not got any call from the bank for verification, but the lady on the other side did not listens to me and tries to threatened me to call/contact that guy to pay his loan amount. After several time call i told them that i will file a report against them but now i am getting missed calls from their numbers. What shall i do? It is very irritating.
My number is - [protected]
Their number - [protected]/[protected]