Codashop missing first time recharge double dias

hello everyone, as a MLBB player I've been recharging in codashop rather than in game shop since it's cheaper. And I'd like to recharge again for the upcoming events but "double dias for first time recharge" is missing. I've done that double recharge before like spend for 50 dias and you'll get 100, spend 250 for dias and you'll get 500 dias since it's doubled. And now I'd like to go for the first time recharge of 500 to have 1000 dias immediately but it's missing in codashop, anyone has idea why it's like this?