BP Promotion Collectable Cars with Pick n Pay

BP runs a promotion with Pick n Pay to fill up for R600 and you get a code , after 4 codes you get a free collectable car. Twice I put petrol in at BP Sunnyrock, I never got a code. I contacted Pick n Pay, it took me over a month to eventually get a code. I took it to the same BP and declined. Now I phone BP they say its Pick n Pays problem, Pick n pay I have no response on my emails. Funny this is that BP Sunny rock is the only BP around the East Rand that is still sitting with these collectable cars. I have stopped everywhere else and they have none. I have only managed to collect 2 of the 4 that I should have had. Tomorrow is the cut off day for collecting, no luck on both parties. Very annoyed, will not support again