un athorized transaction made by the company

i got message saying that my credit card has been charged USD 190.65 (11,842.20) on 25.10.13. But, I never made any transaction such kind of thing but after enquring from my credit card customer care people they said it has been deducted already and they have take na complaint against that they said they are going initiate a legal procedure to get back that money and it will take some 2 months, i dont know whether it will get back to me or not. Without my knowledge they have used my card i dont know how. So guys i guide all of you to get a new card by blocking the old card. its the best option.

regards
srinath