deducted R500

<p>Im so furious with this stupid amazing vouchers, i cancelled my subscription 2 months ago, they told me its R400 to cancel and that they would take R100 a month for 4 months, today i woke up and got an sms from my bank saying that a debit order of R500 went off from amazing vouchers. How can i get my money back from these *******</p>