ONEBOX, WHO ARE THEY?

I have had a debit order for many months/maybe even years to the amount of R45. I've queried this with them via email with no response or acknowledgment. I've now seen another debit order for the amount of R201 deducted this Month, May. Please advise who else is having this problem and how I can stop this. This is theft. I have not authorized these debit orders. Thank you.