Please note that new domain names can take up to 72 hours to be visible everywhere. That’s caused by DNS caching, which is out of our control. Note the orange banners in the client area warning you about this.
I checked the account and I see you created the account this morning, and removed the domain only a few hours later. So of course, now it doesn’t work anymore.
What you saw was perfectly normal and can happen with any hosting provider. It will solve itself automatically and there are workarounds you can apply to see your site sooner.