I wrote about this subject some days ago but want to clarify things a bit and tell a short concise story:
I tried to setup a new website with Host Europe. They have been bought by GoDaddy in April, 2017. One of my first steps was to install a Managed Wordpress site. This system has configuration pages of its own and I told the system to setup a new Wordpress site for me.
I received a mail that the site had been built and was ready to run but I couldn't reach it with my browser. The only network I could use was the one of O2 which is part of Telefónica. And I had experienced problems with this network earlier: The old kolloquia.de site wasn't available from within O2 for several days, and this repeatedly.
After I had built about a dozen Wordpress sites and deleted them again, since I could not reach them, I used the option to make use of a server located in North America. From this moment on everything worked fine.
So, the conclusion of all this is: Telefónica (or O2 as part of it) has a very big connectivity problem with Managed Wordpress sites outside the US. That's my understanding of the extremely annoying and frustrating problems I've had over several weeks, or even months now.
I hope this article may help some people, good luck in this world of monopolies!