Hi
From what it sounds like you have a credit in your GoPhone account of $25 right now. The balance when you dial *777# is what your account has credit. When the plan renews, it will automatically take that balance it out in 30 days and should refect $0.
So next month you should have not to pay anything.
You can manage your GoPhone auto-pay online @ myprepaidrefill.com
Hope this helps!