The up/down Arrow is flashing green since 5 days and then I don't have internet access. I called Virgin Media assistance to solve my issue but without result. When I check (online) my status, the answer is "no known issues".
How can I mobilise someone at Virgin Media to recover a connection?
First thing to do is check that the cable hasn't come loose in the back of the hub and at the wall socket.
If it's still not working you can wait around here for a member of the Forum Team to look into your issue but that can take several days wait.
When you phoned you probably dealt with the offshore call centre staff who are a waste of time. You might get a better result from contacting the UK based Retention Team ... 150 from a VM phone or 0345 454 1111 from any other phone and select the prompts 1 > 4 > 5 to 'Thinking of leaving us'. This team can deal with far more than just retentions.