Faulty Cellphone

I bought a Samsung Galaxy Trend Neo from CNA on the 29/03/2016; from the time i had the phone i had the following problems:The phone reboots by its own. When I go into the internet. It just shows white,I have to go out of the application and go back again and it will either go into the application or not. When I go into whatsup, Gmail, playstore, etc it takes long to go in or it just goes totally out. I took the phone to a Vodacom repair store who informed me that I have to ask MTN to send me their phone settings because its a Vodacom phone; I've done that but I'm still experiencing the same problems. I don't even had the phone for a month and it was giving me the above mentioned problems, I post a complaint on Hello Peter(Vodacom) regarding the below matter and was contacted by Lesley from Vodacom who stated that I have to speak to CNA and inform them that I want to Exercise my rights as per section 55 and 56 of the Consumer Protection Act. I need a refund please.