They refuse to refund me for their faulty product.

I bought Telkom ****le 6GB Data 3G with stater pack at this branch. I was told they will help me to Rica the simcard. i should be paition. It might take sometime. I agreed and understood. They took my particulars to Rica the SIM card. After few hours they came back to me saying the Simcard has been Ricard. I tried to connect my Pc on ineternet it couldn't. I waited for a week still i couldn't connect. On the 18/12/2015 i went back to the dealership to complain. The technical side tried it couldn't connect. They said it freezes and doesn't connect. They booked it in and took my details, saying they will call me. The whole December i never received a call. January 2016 i still didn't receive a call until i deceded to go see them at the dealership. I was shocked when i was told the factory agent will come to collect it in that week. I told them i have already lost a lot of time to use the 3G connection, i need to move on , i need to be refunded. They refused. They sais untill they know what the problem is with the 3G, they won't refund me. When i told them i will go to Media about this, i was told i musn't treatern them and they are not scared of bad report by customers.