Lendingkart — Disturbance and harassment

I've not requested enquired nor applied for any loan from this lendingkart nor from any other financial institution. But on a daily basis this lendingkart is calling me and disturbing me during my own working as well as my own private hours. They aren't sparing a Sunday as well. How is the data and phone no being leaked to such company. Kindly note and register a complaint in this regard