BP Garage Collectible car campaign

I have been following the BP Fuel Smart Shopper campaign and have comp**** with the 4 x R600 fill ups. I have received all the SMSs every time after filling up telling me that I am getting closer to receiving a collectible car. I have also received the last SMS stating that I am qualifying for a collectible and that I will receive my unique code. To date I have not received any code and am wondering if this campaign is really valid. Even on our recent long trip I went out of the way to fill up at a BP Garage to comply, but I will not be doing that again as it seems that it is a money making campaign rather than Pick n Pay delivering on their promise. It really is disappointing.