Misleading information

I took out a contract with Telkom two years back & I was told that the phone doesn't come with a sim card so all along I knew that I was only paying for a phone only to find out when my contract was finished that now I'm owing for the benefits that I have been getting on my sim card & when I ask what sim card they are saying that the phone came with a sim card of which I never received. How do I pay for something that I have never used? Telkom must really sort this issue out because I paid for what I received. I'm not happy with their service and the attitude I got from the manager at westgate mall when I went to enquire about all of this. I logged a complaint months back & till today nothing has been done