Router not working

Hello,

Spontenously my internet stopped working!  It was functioning OK until the middle of June with proper connections. 

However, now, the Internet does not work. The router displays only below lights:

1. Power : Green

2. WLAN: Green

3. LAN: Green (when connected to Laptop, otherwise remains off)

4. DSL --> NO LIGHT

5. INTERNET --> NO LIGHT.

Router Model: Homebox 6641

The internet does not connect at all.

Can someone please help me what to do?

I tried to connect cables again, Install softwares again, change PIN, Factory reset of Modem. But still nothing works.

I tried to call contact centre multiple times over the last few days, but after holding for between 30 minutes to 1 hour at a time, we were NEVER able to speak to an actual person.  We also do not speak German.

Any tips what can be done next, will be helpful.Please help!!!

Thanks

Toby