Unhappy client

Please note that Huurkor treat us we don't pay rent, they don't have a right due date for paying water they just tell us the dates they want, and if u pay on after due dates they disconnect electricity without making arrangements with them, their fees was 180 now they increase to 520 without giving us notice they just write on the message, now I pay water of 330 on 3th they disconnect my electricity now I can't go to work and my can't go to school and do homework they said they don't care I need to pay disconnect fee first of 520, meaning I have to pay 850 for water without telling giving notice, They should call us first to make arrangements not disconnect electricity, we are clients but they don't treat us good, But for us they need notice for everything. Now we can't cook, we can't able to go to work my kids also can't go to school and do homework because of unfair disconnection. Please I need help because I told them I don't have that 520 because they didn't give us notice they just gave us short notice to suit them. Now we suffer because of them. Where can I report this matter?