Heya, a flashing downstream light generally does indicate no connection to the network 😞
Since posting here, is everything up and running?
If not, would recommend firstly checking your area for any interruptions that might be affecting you here.
If nothing is listed then you can also check out our troubleshooting guide for additional steps to try.
I hope this helps, if none of these steps get the service up and running I'd really suggest getting in touch with our Faults team here so we can check it out for you.