Website works abroad not home

Ok. I have done this twice and it is really weird. I am hosting my site on 000webhost. I worked on it for 2 days, everything was fine and then the third day I could neither login to my wp-admin nor browse my site. I called people abroad and even in my country and they can see the site. The error i am getting is the classic “oups google could not find…” after a long time searching for it.

Why i cannot view or access it from home? The first time i ended up installing the whole thing from the start to work again. I don’t want to do this again. My site is http://www.nicosiadesign.com

Today i tried with a different proxy i found on the internet and I was able to login. What is the problem?

Thank you.