[Resolved]  ICICI Bank — ICICI Bank debit card fees charged twice for 6 continuous years

This is Shankar from Chennai, I have been the customer of ICICI bank savings bank account for 16 years.
In the year 2015 I have been issued with a new debit card for additional security (chip). I collected the card form Adambakkam branch. The bank staff have told that the old will automatically be deactivated as soon as you start using your new debit card for the first time. It was the same (after i use my new card, old card is invalid for online and atm transactions).
After this ICICI bank issue 2 other cards for additional security/security enhancement. Every time they give the new card same procedure old card will be deactivated. But when I checked the past year statements, ICICI bank is illegally/Fraudulently charging me for 2 debit cards, by showing that the old card is active in their system.
When I raised the customer query, I am not getting proper response, Customer care manager (Kaif) said that it will be escalated but another manager ( Sriram) called and told that this is not the process they cannot refund all 6 years excess charged amount. He is expecting the customer to accept only 1 years refund even though they charged for 2 debit cards for 6 years.
I also came to know that one person cannot hold 2 debit cards for the same account unless it is a specified request from the customer. Then what process allows them to charge for 2 debit cards for 6 years?

Thanks,
Shankar