Faudulant debit ordera

Every month this company is busy deducting money from my account. I don't know who have them an authorization to debit from my account. Last month I made an arrangement with their client directly "African bank" u debit from my other bank account the amount of R300. Then after this people decided to load a debit order of R500 again on top of the R300 .

U I am sick and tired. Think it is time i contacted the debt council to find out if this is legal. Should I not get feedback by end of business tomorrow I will contact the debt collection council