yudumcan: Ok I finally managed to talk to someone! They said if there's a fault and house needs rewiring it's $200. Technician said she'll run a line test today and I'll give them a call tomorrow to see if the line is faulty or not.
And she said if I have naked broadband I don't need a master filter. [TRUE - BUT ONLY IF your old wiring is disconnected and only one line (to the VDSL jack) remains]
She also suggested that I should connect with an ethernet cable and run the speedtest again ... [TRUE - ALWAYS test by Ethernet]
and if I get more than 10Mbps download that means I'm on standard VDSL connection. [BOLLOCKS]
So if none of the above happens does that mean I'll need rewiring? [PROBABLY - depends on the line test - which they should have done BEFORE installing]
So what are your speeds via Ethernet?