Debit order reversal

I know that I am in great debt when it comes to my sportscene account and I swear when I get a new job I will get it paid up I did cancel the debit order already in May yet they are still debitting off my account and I'm currently unemployed and pregnant the money in my account is to get through the month that's why I told them I will try to pay a R50 last month I requested a reversal and this month but nothing