CARTRACK UNEXPLAINED DEBIT RIPOFF

Cartrack debit my account twice per month with different amounts throughout the year. I wasn't aware because i normally gave the card to my son to use and don't really cared about this account. the problem arise when i called them to get my moneyback and demand an explanation. they promise on different days by different personnel members that they will call me back after checking the account.no call back ,only email stating I'm in arrears. I call asking for management, they're always not available, no direct line to management either. I send email on their CEO complaint email account. no response. this is a real bad company