I wonder how are you people going to ask the customer service for the cashback that you didn't receive.
CS : Sir, how may I help you?
You: I would like to complain. I didn't receive the cashback for Week X.
CS: Sir, the system will decide who are the winners based on first come first serve.
You: But I have proof I am one of the first comers.
CS: What is your proof , sir?
You: I screenshot lowyat forum and some people that made transactions later than me managed to get it. (Wow, lowyat forum as proof?) / My friends that swiped later than me managed to get it. (What proof to be submitted of your friends?)
CS:????

The summary is, how are you going to prove to Public Bank that you are among the first comers to win the cashback? And the consequence would probably be, PB will be highlighted about the method of winners through paying BigPay, and when there's enough complaint about it, the game is over :-)

That's, if they want to act, based on 'say'. Anyway, I am interested in knowing more about this. Please do update us forum users, if they're willing to investigate. Worth a try, perhaps?

Please wait 2-4 weeks after current tracking month to know if you're a winner. The terms and conditions are there for a purpose.