Beyond terrible service

<p>I bought my Sony Z3 last year June on a contract . everything was going well until it randomly switched off and refused to switch back on again I booked it not for repairs it came back and this happened again after a short while . The same problem occursolving and when it comes back it'll randomly switch off when using it ,its been in for repairs 3 times and on the 3rd time it came back with a broken screnguard (the screnguard was perfectly in tact when I handed it in) and it has no play store ,a default Internet browser , default Google apps like Gmail , Google Chrome. so obviously I can't download anything because no play store or any browser . I keep asking for a new phone because there's an evident problem with this one and it's going back in for repairs for the FOURTH time and Vodacom just doesn't listen. I'm paying so much for a phone I hardly use because majority of the time it's in repairs . </p>