Worst Experience Ever

It's been 2 months since I, and multiple other individuals won the Vivo Mobile Women's Month Giveaway. None of us have received our prizes and none of us can get hold of anyone in the company. I personally have contacted them on Instagram (where the giveaway took place), Facebook, on their website, as well as all the emails I could find. Occasionally a lady would call me to see whether or not I've received my prize (only after I tried numerous channels to communicate with someone in the company, without any success) and she'd promise that I'd get my prize by x date. Every single time. On none of the occasions did I receive any actual written communication that promised an exact date when I'd be sent my prize. Last week I got an email that supposedly claimed all the prizes were sent. None of us received our prizes. One of the requirements as a winner was that we needed to send our contact information, which means they have it and choose to ignore us and hope that the problem will go away. Each and every contestant entered on the basis that the company would good through with it's promise to whoever won. Which it did not. This is false advertising, terrible social media services and an overall reflection of a company that does not care about it's followers or customers. How is this okay? Can someone who is in the position to get the ball rolling once and for all, please send all the winners their prizes.