KreditBee — I am getting the call from KreditBee that I am a witness for someone who has taken loan, in reality I dont know who the person is?

Continuously everyday when i am in class I am getting the call from KreditBee agents to talk to a person named shravani (Female) that I am a witness for someone (shravani) who has taken loan, in reality, i dont know who the person is in my entire life I don't remember the female named Shravani but they are calling and using fowl language and arrogantly speaking to me and disturbing the mind to do work and due to that lot of issues has happened in the class as I am a teacher I need to have sound mind to give a best in the class but these people they are calling and disturbing it.