Hmm. For some of your questions, I'll ask my buddy. Or maybe someone more familiar with this can reply.
But ya, good customer service in Malaysia is hard to find though. But at least it's free call customer service for digi

If I not mistaken, most customer service personnel there are contract staff, but that's no excuse for poor service. But my experience with them so far is ok, compared to other customer services that I have dealt with.
If it was me, I'll probably take down your number and offer to call you back when I have a proper answer.
For these ones:
"Receive My Bill via E-mail" > free
"Receive My Bill Notification via SMS" > free
"Payment Due Notification" > free
Hope this helps a little.
UPDATE:
Perhaps this could help:
http://www.digi.com.my/whatshot/promotions/ebilling/faq.doQUOTE
1. Is there any subscription fee when receiving my e-Bill via OCS?
No subscription fee will be charged.
2. If I choose to receive the printed Itemised Billing, will I be charged?
A monthly RM3 subscription fee is required.
3. Can Principal line view all its Supplementary lines' bill via e-Billing?
Yes.
4. Will I receive any reminder for my e-Bill delivery and Payment Due via OCS?
Yes. As an OCS user, you will receive an SMS reminder automatically when your e-Bill is ready for viewing. You can also select your preference for e-Bill delivery or Payment Due reminder via SMS/email from the Personalisation option in OCS.
5. How many months of bill statements can I view via e-Billing?
You can view the last 6 months' e-bills via OCS.
6. How many months of Bill Analysis of my usage can be performed?
You can analyse the last 3 months' bill with Bill Analysis.
7. Are there any other e-Billing functions that I can use via OCS?
You can view/download bills in PDF format, perform sorting and filtering of your Itemised Call Charges, pay bills via credit card, email bills and personalise your OCS.
8. When will I receive my e-Bill via OCS?
You will receive your e-Bill after 7 days from your bill statement date.
This post has been edited by SweetPuff: Aug 17 2007, 07:10 PM