Vodacom Phoenix branch

I gotta say that Phoenix vodacom branch are absolutely terrible with their customers service.... I have been having endless problems with my cellphone phone... A brand new phone...they refuse to replace me with a new device... Even after coming back from the repair center there's been more problems with the device... It's a problematic phone.... And there surely aware of it... And I have keep explain this to them.... It seem like a give a damn we are paying for our stuff.... They are full of nonsense.... My device was given back to them before the 7 day period.... As a customer I am truly unhappy with they customer service... I am paying for something that's not even working properly...software problems and now battery problems... As well has loose frame on the outside after getting it back from the repair center.whats the way forward.... Poor poor I request of a new device.