Abn Amro — Credit card query

Sir, refer to your letter dated 25.8.2015 wherein you had mailed for settlement of outstanding dues. I have also intimated that i had never transacted through this card. I also requested to close the card. Suddenly after many years, i got a phone call and an e. Mail from puja, retail ard, kotak mahindra bank ltd who informed that the captioned card has been sold/transferred and assigned to phoenix trust fy12-6 scheme a of which kotak mahindra bank is trustee. She also asked me to deposit a sum of rs 3600 in shape of cash in account no. Provided, standing in the name of "phoenix trust fy 12-6 scheme a" in any kotak mahindra bank. She also informed that no dues certificate will be issued within a shortest period of time after realising the amount. Since i had already paid the dues, i would request you to kindly look into the matter personally and verify the account in details and inform me the latest position in respect of the same. Also update in my cibil as it is not properly updated there... I am sending this complaint since i am unable to understand the involvement of kotak mahindra bank and "m/s. Phoenix trust fy12-6scheme a", the details of which are not known to me.
Yours sincerely
Mayank kharbanda