Well I used a coupon code, that'd give me ulimited bandwidth and storage for a year, @ $9 and some change. I'm not sure it even worked. My billing in the hosting panel says I owe money in 14 days..
Does the billing say how much you owe? Mine always says my billing cycle ends in x number of days, but nothing to owe. If it states some dollar amount, submit a ticket to Sales and see what they have to say.
I am also using a coupon code, but they are always reminding me my owe. So that, I know the exact amount, and I know how i will be going to budget my money. However, my code was already expired, and I am looking for another one.