Sony Z5 compact

Job Number ***9, I received my new Sony Z5 compact middle November 2015, after a month the phone showed red, green and pienk stripes and the bottom of the touch screen was not working. We send the phone to Vodacom repair shop Potchefstroom where they updated the phone, upon receiving my phone after two weeks the problem was still there. Send the phone back for a second time and they replaced the screen but when I received the phone the problem was still there. Now the phone is send back for a third time to Sony where the phone is being assessed anfd I am still waiting. After all this vodacom will not replace the faulty phone because it didn't happen within 7 days.