Hub 5 arrived today - but DOES NOT WORK!

Had notification my router (Hub 3) needs to be replaced / upgraded

Received the new one today a Hub 5 – plugged it in and switched it on – white constant light

Connected phone to Wifi using "scan to connect" – wifi connected – no internet – slow blue flashing light on router

Checked connection of coaxial cable – which was fine – restarted router – told phone to forget network and connected again this time via manual entry of password - same outcome

Tried connecting my PC just in case it was a phone thing – same outcome – wifi connected – no internet connection – router still flashing blue. 

restarted router again - same outcome 

Reconnected the old Hub 3 and i have internet again – but as I understand it VM will switch this off in a few days as part of the “upgrade” - and i cannot be without internet as i need it for work 

seems like the new router has a problem  

Can anyone help before i lose internet access ???