billed for no service

I have sent emails and called the call centre. I opened up a new contract with cell c.<br> <br> I was unable to use the sim card / make phone calls, let alone connect to the internet yet I'm being billed??<br> <br> This doesn't make sense.<br> <br> When I received the phone, I was advised by store consultant that the sim isn't activated yet.<br> I managed to connect to wifi, yet im being billed by Cell c for data/airtime.<br> <br> Please explain how this works because I'm confused.<br> <br>