Unauthorised Credit Card dedution

Received an email and invoice yesterday with a flight voucher for a club I had not joined.
To top it off they had deducted the money from a friends credit card which we had used to pay for flights on the web site in my name. On checking my account Jetstar had saved my friends credit card details on the account.I never authorise any merhant to save credit card details for further use and certainly would not allow saving of another persons credit card details. Surprise surprise Jetstar do not have a phone no to call so dealt with a remote chat room. Got told they would have someone call me within 15 days. Suggested that that was not a good enough solution to deal with fraudulant use of anothers card. Also on checking my account profile I found they had done it last year also. I did not pick that up so am presuming I did not received notification at that time.
Due to dreadfull flights and service in the past I had decided to not use them in the future but this just tops it off.