Vodacom Shake to win ****

All my puzzle pieces ****erally ALL of them) need 1 more puzzle to complete, including the main prize. I have been buying airtime to shake and win since the last week already but I've received the sms "you've already collected this piece"! It's absolutely ridiculous receiving the same pieces on multiple occasions for different puzzles. The **** is truly real, because how convinced can one be to buy more airtime when... You only need one more piece. My attitude towards vodacom has changed drastically. How can Vodacom **** millions of South Africans to get more income as we have been buying and playing these puzzles to win but get duplicate puzzles when we only need 1 puzzle to win the prizes.