Loan fraud!

Take loans in various banks like in 1Card,Kotak, even SBI. Provides the secondary sim numbers as the prime contact. Later sheds them. Someone else somewhere re-purchase then. Now starts the game. Calls for loan repayment starts pouring in. The banking staff doesn't care to listen at all to whatever you try to say. They're not at all interested to hear that you are the new owner of an old sim which went up for sale again. It all starts casually ending with harsh words, abuses and threats if you won't lean in to pay. Say, they're calling from Pune and/ or Hyderabad branches but not sure.