Capital Float — Fraudulent use of ecs mandate

Even after clearing all my dues of laon account with capital float under one time settlement offer they are wrongfully hitting ecs on my linked account. This is totally fraud which i want to report. And because insufficient balance its getting bounced and putting heavy penalties on me by my bank. I have written emails to them solve this but they are again and again presenting ecs fraudulently. I am not getting any response from them. Now question is will they ever stop and who will the penalty which are levied on me by them. Also they have goons as their recovery agent who send threatening messages on personal WhatsApp chats which is totally fraud. So please help me to get out of this fraud and harassment.