very poor service

Hi my name is Tendani Muhammad I am a cell c postpaid subscriber last week u upgrade my contract I phone the call center and asked for an upgrade with Samsung galaxy s6 edge I specifically told the lady who was assisting me that I want a Gold color galaxy s6 edge as I already have one galaxy edge in white color so today i received my phone just to find that it's also a pearl white I didn't open the box or any of the packaging I phoned cell c call center to inform that I didn't ask for a whitone the lady on the phone from cell c there is nothing they cam do because they send what ever available color they have in stock how it's possible will any one like the same pair of shoes or same type of shirt in your wardrobe I told her that I am the who's paying for this contract so it's should be my choice but she refuse to understand my point she was keep talking about terms Nd condition then I got frustrated and discontinued so kindly help me what's are my right as a consuser<br> Thanks