DSL Activation

Hi,

the internet technician visited me today and connected all the cables to make my O2 Home L 250 DSL activation. He told me everything was ok, and that I had to wait 20-30 minutes before configuring the (custom) router. I have been waiting almost 3 hours but the router internet light still blinks. I tried configuring with o2 service app and it says the problem is internet itself (no internet coming). I think it is not active yet. How can I speed up the activation?

In my previous apartment I had O2 Home Flex with the same custom router and it worked fine. So the router is not the problem here.