Payment issue

Hi. I took out a data contract with telkom in 2020. Which I canceled because I was told I was going to get 100GB of data, only to get 500mb,when I enquired they said the 100GB is I will get at telkom wifi area. And I specifically asked the person who was assisting me to confirm the 100GB. So I requested a cancelation. After some time, I got a message that I owe telkom, I requested them to provide me with the recordings as they claim our calls are being recorded,they did not. They handed my account over and I kept telling them I canceled my contract and they should give me the recordings. I went to telkom shop at Rustenburg waterfall mall and was not assisted. Today I received a message that I owe 7000. All I'm requesting is, I canceled my contract within the required period and they collected their router,so why was I required to pay.