If the DSL indicator light of an O2 Homebox 6641/6441/6741 is not permanently green, there is no DSL synchronisation and consequently neither Internet nor telephony can be used.
Please check whether the o2 Homebox is correctly and securely connected to the first TAE socket in the flat using the grey DSL cable. 
If this is the case and the DSL indicator light is still not permanently green, a fault report to o2 customer service is required. Please call the customer service from your mobile phone when you are at the router. If you do not have a flat rate on your mobile phone, you can also use the free phone number 08005251378. Do not hang up on the hotline yourself - after a pause, the call will continue!

Hi @James86potatoo,
did the tip from @blablup help you or do you still have limitations with your internet connection?
Kind regards
Larissa

Dear Larissa and blablup, 

Unfortunately i still have no internet connection, the 4th day. 

I noticed that there whole region is out of service since my neighbors suffer the same. Therefore, i am wondering what is the expected time to fix the connection for our region? There should be an SMS message notification telling us the up-to-date information instead of keeping us waiting in the dark…

Kind regards,

Hi @James86potatoo 

I just checked your line and it is a personal disturbance in your connection not a problem in your area. 

You can call our English support to open a request for repair. 

Call 089 6666 300 81  from 10 am to 6 pm and get in touch with my colleagues.

Greetings