Unfortunately its a 17 hour average, so means a lot of tickets are a lot slower to answer. If it was a 90% are answered in 17 hours thing then its a very different stat.
In theory PlusNet should be able to see when you are actually logged in, and then marry this up with the usage figures, but if it is clocking up 200MB or more a day even when turned off then something is wrong at their end.
Whether Ofcom will listen hard to say, then may ignore you since the service still works even if going over the limits - or is it such that once 7.5GB is hit the connection is more or less turned off.
My connection is hosting a webserver, I listen to radio online and am around the forums all the time, but still I only manage a daily average of about 250MB
If you get nowhere at all with Plusnet then email me
[email protected] and will see if someone at Plusnet will take a look.
Andrew