After an all-too brief look on the internet there does seem to be something of a track record of hacks into your web host and some of its subsidiaries, in particular their control panel code. These shared web hosts run a fairly sophisticated piece of code that manages many dozens, often hundreds or even thousands of sites per server. One compromise generally means many more. Given that many hours have gone by and your site still suffers from the cross site linking attack, you should consider whether your hosting firm is up to the task. If a host is that inept, they are not worth sticking with.

Get a local backup of your *data* – an export from your blogging system; a mirror copy of your blog as is, as a static site if nothing else in case the worst happens. Do this as soon as possible just in case your hosting company does something radical and stupid like erasing/formatting their disk drives and starting over.

Don’t laugh, I’ve seen bad web hosts do all that and worse.