You should contact the prepaid customer service at *611 from your phone and ask them about the balance of your account.
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.
As soon as you put money on the account, say $45 to cover a $45 plan, the balance comes to $0. You need to have $45 min by the time autopay drafts again. The extra 1GB will be added after the first successful auto payment is made.