Sad but bad

I decided to upgrade my line over the internet this time, what a issue. The phone arrived and I was so excited to show it off, but wait the speaker does not work. My very first call I received I cannot hear a word the other person is saying. Immediately I called Vodacom and reported the faulty phone, a friendly Ashley tried to convince me to take another phone but I insisted on the Iphone 6, it's been a week now and my new replacement I was promised is not in my hands yet. Do I need to cancel all my lines with Vodacom? Or will somebody fix this?