First off you need to contact i4host.net. This is not support forum intended for i4host.net. Visit thier site and try to find another contact or support page for thier site. This is stictly for cPanel (the control panel for hosting accounts).
As far as deleting your hosting account, I would considering they have probably misguided you here anyways =o) You should be able to transfer your domains anywhere you want, you do need to contact i4host.net and talk with them about moving your domain.