Billing Problems

I keep getting messages to update my billing today. I purchased a domain today which should be $7.00 since I opted out of domain privacy. It's the only thing that gives me a clue there must be an issue with this. I wonder if I'm still being charged for domain privacy even though opted out of that. Regardless there should be ample to cover it. I try to log in to my domains to see if I can determine any problem but I can't seem to get anywhere except on the billing page.
How can I find out what the issue is and make sure I'm not being charged for the domain privacy as well.
Thanks