Telkom contract ****

I have data contract with Telkom that I app**** in March, I was told that my simcard will be activated within 24 to my surprise Telkom did not activate that simcard...I then went to their branch and ask them to deactivate my contract since I'm not using their services I was then told that they can't I need to call their call centre I did that but unfortunately I didn't get hold of their consultants now I'm receiving a statement which says that I'm owing Telkom R1082.00 how can I owe them so much money whereas I'm not using their services at Telkom please fix this mess.