[Resolved]  WNS Global Services Limited — Grievance for Unauthorised transaction billed to my Manhattan Card Account

am a holder of your Manhattan Credit Card since the last couple of years, yesterday while making a transaction on my card I found it not working so I called up the customer care helpline, they informed me that my account balance has exceeded the limits. The last statement dated 20th April 2008 showed a balance outstanding Rs.7692.32 with the due date of payment 12th May 2008, I paid Rs.5000 on account by cheque no 475606 drawn on ICICI Bank, confirmation of receipt received over sms.

Now upon asking your customer care executive he gave me a list of detailed transactions upto dated 19th May 2008 amounting to Rs.71393, the entire list of transactions were not made by me and to me looks some kind of mistake or fraud committed by someone.
What is my rights and liabilities in the present case? what I should do in case?