Shaha Finlease — dues settled but not updated by shaha finlease and harassment

I was holding a standard chartered credit card [protected] (don’t know whether this was the one which they are claiming) in 2003. I indeed settled the dues amounting 12k. I lost my father and went into a shock for almost 4 weeks. During the time, I misplaced the credit card as well as the settlement letter too. Subsequently this completely skipped my mind owing to the stress and circumstances.

Now they are coming back to me, harassing me badly and asking me to pay 1.37 crores of dues (against the 12k which was already settled). Please advise whether I should lodge a police complaint. These are cheaters