I think AfriMan may have sent that to you

I do share AfriMan's sentiments around which data link is used first though, if you topup then that topup data should be used before the monthly allocation does. Either way, the data is there for you to use.
We used to offer EFTs years ago but it didn't work out, and does involve a lot of backend admin from our end. Automated EFT systems could allow us to read the validity of the POP and have that amount allocated to your account, but previously we've seen a lot of late payments via EFT, or clients forgetting to use the correct ref#.
EFTs allow too much room for error and isn't an efficient payment method to fit into a fully automated billing system.