Vodacom Shake Off *******

The Shake Off competition with Vodacom is a complete *******!! You buy Mega shakes for R5 a shake with your Vodabucks. You have one puzzle piece left to win on all of the prizes, you chose to buy another and another and another and it goes back to any one of the prizes and highlights a puzzle piece you have already won and it states that you have already chosen this puzzle piece. My question is if anybody has won any of these prizes from the Shake Off competition through Vodacom?!