How do I get the biGBonus 1GB/2GB/3GB every day which can be used from 1pm to 7pm?

You will get it automatically once you subscribe to either biGBonus RM35, biGBonus RM50 or biGBonus RM70 (i.e. no redemption required). From 1pm to 7pm, the biGBonus 1GB/2GB/3GB quota will be utilised before the base quota from your biGBonus Plan. The biGBonus quota is refreshed daily throughout your plan validity.