contract ended but they still want more money

Good day<br> I have a problem with Telkom account I had a contract with them that I believe was supposed to be closed in June 2015, because contract has ended. I was surprised to receive a statement stating that I owe them R270. On the below mentioned date and time I went to Maponya mall branch to query and they referred me their costumer care center that i called and tried to explain that on June 2015 i went to Maponya mall branch to clase the account and i was assisted, they filed a form to close account, i gave them my ID and they confiremed that account will be closed. My account was never closed because i could use the account . I then decided to call the contact center and they said i have an outstanding balance in July but because I am not working I couldn't pay it and paid in August an amount of 1330 and called them to close the account and they agreed to do so. Someone called me again asking if I will like to continue with the contract and I strongly said NO and believed that my account will be closed. Now they say I must fill in the closure form again and pay the outstanding amount , I am really disappointed and do not know what to do since I am unemployed pls assist .