Keep taking my money longer after contract ended!!!!!!!!!!!!!!!!

I entered into a contract with Teljoy during on 8 August 2015. I started paying from August 2015 and if I count 36 months from August 2015, I get to July 2018. We are in October now, but still you continue to debit my account, the full amount. In your accounting books, as per the statement I was sent, I shows that my account is in a negative, which means you owe me money, yet you continue to ***** from me. Even when I reversed the 39th debit order, you still attempted to withdraw the following day. You also have the nerve to let me know I must pay the 39th installment, otherwise you will collect the items. Have you guys gone and lost your damn minds. You already made the same mistake with a television set of mine, which I was supposed to have finish paid in June this year, but you kept billing me until August. At least one of your Consultants were competent and confirmed that you owed me money, which was paid to me. Even at that time, he noticed that you will be billing me an extra month for the other two items, and said that I dont have to worry, coz I will be credited. I do not know if your people just do not want to take the effort to look into my account and see that there is a damn big issue. I want my money back now!!!!!!! And stop *****ing from me. It is so damn ********. I even had to ask for two weeks to get a statement from you guys. It is just pathetic. Pay back my money now. I am also lodging a complaint with ombudsman right after this post.