But do first of all verify that you haven't been hacked. There's about quarter of a million domains I've flagged that, besides their wordpress content, also host a ton of link spam crap off in some hidden folder. This reflects on the quality rating extremely negatively to the point where you may have not been indexed at all.
Secondly, are you behind cloudflare or some other big-name CDN? Because, as I mentioned in another comment, I can't crawl their pages without getting captchad until they approve of my humble request to be classified as a good bot.
There are some other hosting providers I flat out block on a subnet level because they host a large amount of link farms. This is currently Alibaba, Psychz, eSited, Cloud Yuqu and 1Blu.