Bangalore Metro Rail Corporation — card not read

Address:

Bangalore, Karnataka

My card was not readable when i meet customer assistant he told me go to your nearest metro station and submit it. But card has no any scratches and physical damage when i came to bypanhalli metro station i submitted my card which engraved id-[protected] on 29/8/19. As per his instructions i meet him after few weeks. Customer assistant was demanding for card amount for maintain last balance. Why should i pay to him because card has no any damage till it is pending now.