Citi Bnak Credit Card / withdraw Rs 11000/- on returned check

Title : Citi Bank
Complaint Details : Citi bank has disonered my Payment of Rs 11000 without
any matter charged me Interest on my out standing amount and i paid one
more check of Rs 11000 they accepted the check then they also represented
the older check (which they have disonered ) to my hdfc bank and withdraw
Rs 11000 from my bank account and taken more payment then my out standing
amount. So my credit card account is in credit of Rs 9300/- Now they are
refusing to pay me my RS 9300/-.
Consequences : Please let me help to get my Credited amount of Rs 9300/- .