Negligence of branch

I went in for the upgrade of my phone at the end of March and received my new phone which is the Sony Xperia M2 Aqua. I had the handset for a couple of days before I realized it had a hardware issue (auto rotate sensor not working). I proceeded to take it in to Vodacom for repairs, since I had the handset for 10 days already it was apparently too late to receive a replacement phone. I was told it would take 7-14 working days for repairs which I understood. Today is week 3 of not having my phone (14 working days). I have been calling the store on and off during this time and they told me the phone was away for repairs. I was finally called back today and was informed that my phone has only been sent in for repairs YESTERDAY