I Would Like A Cash Refund From CVwizard

I used CV Wizard for what was clearly presented to me as a one-time CV creation service, and on 15 January, I made a payment of R19.99 using my Mastercard. I then discovered that I was charged again on 30 January, this time for R299, which I did not authorise or intend, as I never wanted or knowingly agreed to any subscription. I did not sign up for a recurring service and was under the impression that I was only paying once to create my CV. After noticing the second, higher deduction, I tried to cancel this unwanted subscription and contacted CV Wizard customer service, but I have not received any response so far. I request that this unwanted subscription be cancelled immediately, that my details be removed from any recurring payment plan, and that the R299 taken on 30 January be fully refunded to me, together with any other subscription-related charges that may have been applied without my consent. I also ask for written confirmation that no further deductions will be made from my Mastercard without my explicit approval.