Hi, sorry for writing in English. I am still learning German 
I hope that someone can help.
My internet connection is not working since 15.30h today 03.05. I called the hotline and they advised to just wait as it might be caused by the installation of fiiberglass connection in Hamburg. I asked how long should I wait and they didn't give a defiinite answer.
I tried all basic troubleshooting and it looks like the problem lies with the DSL connection itself.