New contract and received a broken phone

I received my new contract with the phone on Monday the 7/12/15. When trying to switch the phone on after I charged it for 45min the phone did not want to come back on. I phoned the Cell C call centre 084145 and after holding on for someone for more than 20 minutes the guy tells me that it is too late to book the phone in and that I must phone back the Tuesday. This was unacceptable to me so I went to the Cell C store in Westgate where i received good service from the consultant. She got the phone on. Now Wednesday 9/12/15 the same thing happened. The battery is fully charged but the phone goes off and then the only way getting it back on is if you connect it to the charger. I reported the problem again and they informed me that they will get RAM to come and collect the phone and then I must wait 14 working days for a new phone. WHY??? This is a brand new phone, so why can they not just replace the phone. Now I have a new contract with NO PHONE because I must wait 14 working days to get a new phone. The phone isnt even a week old. I think this is so unfair. I want to CANCEL this contract, because why have a contract with NO PHONE!!! This is really not what I was looking for.