I have contacted Sky help last saturday, went through the pain of Tier 1, limited help via Tier 2, who logged the error with Tier 3. Sunday night the light came on for an hour, then died, last night 2 hours 6pm-8pm, then nothing. Makes me think nothing wrong at my end. Anyway how can I get through to Tier 3 and/or check whether there is a fault at the exchange ? any other ideas welcome.

PS call centre were emailing Tier 3 to contact me thursday past (being 5 business days) and today, so far no call back.