Debit order actioned despite me cancelling

MiWay contacted me regarding car insurance on the 21/01/2015. Only after they sent me the contract did i see that there was also a once off fee included with the first debit. Also after they have sent me the contract, i started receiving sms that i need to install an anti hijack device. The policy was to start on the 23/02/2015. Three days after i emailed [Email Removed] to say that i have decided to sell the car and i will contact them once i have bought a new car. I just received automated emails stating that the email has been received and a consultant will be in contact with me. After sending another 2 emails, clearly stating that they could just reply via email to say if my request has been actioned as i could not answer my phone while at work. I have received no reply via email, i have all the emails i sent to them. Today the 23/02/2015, a debit order went off for R618 off my account from miway, i do not understand what they are debiting me for if i clearly told them that i no longer have the vehicle and will contact them when i have a new car, so basically i was debited for car insurance but i do not have a car at the moment. I want my money returned in my account ASAP.