Unauthorised transaction on Credit Card

On 27 January 2015 and amount of R164.85 was deducted from our Credit Card. I did not recognise the company [URL Removed] US. I querried immediately with Credit Card. They referred me to Customer Services, they again referred me to Disputes. Disputes rep**** that they have high volumes to handle and I should call Customer Services. After more mails, I was given an e-mail address for ispeech [Email Removed] Vanessa Rose from ispeech rep**** that I signed up for some app. I querried again and wanted contact numbers from her to cancel. She just ignored me. I feel Absa Card should not allow debit orders to go through our account without our authorisation or knowledge. I want to cancel and get refund. They could not even tell me if it was a once of premium or monthly. PLEASE HELP.