Phone keeps on giving problems...

I have handed my phone in at vodacom repairs canalwalk for more than 3times now. Everytime the phone was sent to Johannesburg for repairs and everytime i got a refurbished handset back, because they could not repair it. For the past 3weeks, my phone gave problems......again! It keeps on switching off. I went back to canalwalk on Saturday, 26/09/2015. I was asked to hand in the phone, again. <br> I can no longer play this game with vodacom and insist that this matter is taken up with management.