Unauthorized Debit Order/ *****

There’s an unauthorized debit order from a company called ONE WORLD TELECOMS PTY LTD and the ultimate collector is 1STHEALTH with the reference number ****552. They debited R96.00 on the 31st of March at 18:53 and last month the 30th of April 18:54. When I checked in my App what this debit order is all about and I found out that it was created on the 28th of June 2021 with amount to be deducted of R95.00 and max of R142.50 on the 25th of every month. Can you kindly call me on 0683879423 from the company to explain what the contract is all about and to cancel it. I would like to get refunded because I don’t remember authorizing for this debit order and also taking a contract under this company.