yes you can contest, for I believe, a year from the credit card statement date; this may vary by card company. have your statement upon which the charge is listed as well as information about the purchase, date, who you spoke with, email, confirmation number, transaction number etc. you may have to ask for the fraud department which is usually screened by a customer service rep. card company may send/email you a form to complete with details, dates of attempted contact, and have you sign that you are filing a legitimate claim. it may take a couple statement cycles for a credit to show up. good luck.