O2 wifi router not getting a DSL or internet conmection

This morning the lights on my O2 Wifi router were flashing 

Internet LED - alternating red and blue,S

DSL LED - Flashing on and off at both a rapid and slow pace.

I am able to connect to my wifi router withy devices however when connected I am unable to use it for anything as I have no internet connection and I am unable to obtain an IP address from the router. 

Is there anything I can do from home to fix it as I need wifi to work from home?

From ringing customer service this morning the only advice I was offered was to try and restart the router in various different ways, none of which worked. 

Edit by o2_Katja: Moved to our english community