Hello everyone. I am really sorry for English but I can't speak German (this is why I can't never reach customer service). I just moved in a new apartment and for the internet setting up (DSL) a person who works in Telekom just came to our place and set up our internet in our flat and he said that there is very good connection and should wait 15 minutes and the internet going to be activated. But unfortunately even all the adjustments all set up in router and there is internet connection no problem about the process we check with all possibilities but we can not access the internet even though our widgets shown as active in the router. Everything is normal we restarted modem many times and adjusted all the things properly but con not use the internet even we connected the network. 

Is there any solving problem out of restart, reset or plug off-in things? 

PS: Router: Speedport Smart 3 
       Status: Green Light 

       Reset, router adjustment and plug off- in done many times
       The guy doesn't do any thing in the main internet box in basement
       We don't know ex tenants uses the DSL at the flat. 

I really need your opinion. Thanks a lot. 

Best regards.