You don't need to renew the iPage hosting, since you aren't using it. Voice doesn't have anything to do with iPage.
You just need to keep the domains (in this case registered with 123-reg) that you want to use.
Voice hosts the site for you on its own servers. You don't need any third party hosting at all. The only thing you would ever need to pay for is a custom domain - everything to do with Voice itself is completely free.