Taking money out of my account without permission

In about <br> 2005 the bank reposessed my house as i could not pay the bond due to squatters who moved in and refused to pay or move out. I re**** on the person i rented the house to to pay the bond but she moved out without my knowledge and gave the house to squatters. When i went to collect the rent i discovered what she had done. I was retrenched at the time. 10 Years later Absa legal decided to just draw any amount of money they want to out of my account for the outstanding amount i still owe them, Last month they took 2200 and left me with 300, this month they took 5000 and left me with 1200. I am unemployed and have a 12 year old daughter. That was our rent money for June. Now we are left with nothing and the landlord does not want any excuses. I earn money by sewing from home, sometimes until 3am in the morning. When i contacted them Nitasha tolld me they have every right to withdraw money out of my account. I told her i was going to close the account and she warned me that i would be left with only the clothes on my back if i did that. How can they jjust withdraw money from my account?