UOB Newsletter showed this offer

"Get RM18 off and 300 Bonus AirAsia points when you spend a minimum of RM180 on flights." TnC state applicable by keying in UOB card no or promo code UOBMY during payment.

But AA website & app, the only place to enter promo code is b4 searching of flight. Hence, we will only get promo code "invalid".

Anybody know how to apply this offer?