-topup 5 get 1GB 4G LTE data 1 day
-topup 10 get 1GB 4G LTE data 7 day
-topup 15 get 2GB 4G LTE data 7 day
-topup 30 get 4GB 4G LTE data 30 day or 4GB Broadband 30 day = 8GB
-topup 48 get 6GB 4G LTE data 30 day or 6GB Broadband 30 day = 12GB
-topup 68 get 10GB 4G LTE data 30 day or 10GB Broadband 30 day =20GB
-topup 88 get 14GB 4G LTE data 30 day or 14GB Broadband 30 day =28GB

top up or buy? and how can it get 8GB, 12GB, 20GB, 28GB if it mentioned here "OR" not "and".