I registered for Digi Discover Day on 20th July 2012. Before registration, I asked if this line has no contract and the customer service said, no contract and can terminate anytime. I need to pay RM50 upfront which will be used to deduct my bill every months. If my bill is RM30 per month than it will deduct RM30 for first month and RM20 for second month.

My bill is supposed to be RM38.00 per month. With auto billing by credit card (which I opted in), I will get discount for RM5 for every months up to 12 months. On top of that I will also got discount for RM3 for 6 months (more on this RM3 discount later).
This is all verbal, not writing.
When I got my first bill, I was charge for:
RM23.95 for usage (pro rate)
RM47.00 for Other Credit & Charges (Contract)

When I called Digi Customer Service, the person said the RM47.00 is RM10.00 for stamp duty and the rest is "advanced charges" that Digi will deduct from my advanced payment over the course of 6 months. This make it like I have entered a contract for 6 months with them.

I believe I has been cheated by Digi becuase:
1. They charge me advance payment for RM50. At the time of registration this seem reasonable because I was made to believe since my charges will be RM30 per month then it will be used up witihin the second month. I know this maybe because I don't understand the contract, but it's their responsibility to make me understand and not to mislead me. Beside the customer service girl already said no contract and can be terminated at any time.

2. The RM3 discount per month might be the reason for the 6 months hidden contract. They failed to let me know this upfront.

3. They "advance charged" me for RM37 (after deduct RM10 for stamp duty). Is this allowed? As this is postpaid not prepaid, maybe they can collect deposit, but not advanced payment like prepaid. And certainly NO to advanced charges to be used as leverage to make me stay with them for 6 months.

What I would like as solution is:
1. Clarify and itemized the RM47.00 Other Credit & Charges
2. Clarify about the RM3 discount that I supposed to get every months for 6 months. From what little I can understand form their complicated billing system, it seem they deduct RM3 from RM40 (the RM47 minus RM10 stamp duty) which seem that my "contract" might be up to 13 months.
3. Use up my advanced payment immediately instead of monthly for 6 months.

Thank you.

go do digi branch and ask for terminate. then u know have contract or not.

Have you ever read the T&C before sign up?  
Where is the RM50 upfront charge in your bill? Could it be a part of that RM37 "prepaid payment" you mentioned??

Taken from here
Notes:
Clearer "sentece" on how that RM50 upfront payment to be returned to you in here: