Many Thanks guys,
Although this wasn't Telstra's fault, they were surprised as we were that all allowable download allowance for the month was gone in three days.
We have now changed our password with something stronger.
H, you maybe right, we did twice restore the thing as we really didn't know what we were doing and it also updated the software twice through this process, it took ages as well.
We did this purposely as we had entered some setting we did not want and thought restoring it to factory setting would let us start fresh, so to speak.
Probably not a good choice, but we thought this would help
So at this point it is working fine, Telstra gave us back all the usage for the month for free,

and we have found it is not a difficult to use as first thought, it is however a shame that the place where we bought it were not a bit more helpful.
They said just plug it in and all will happen by itself, that is OK for a young bloke, but at my age a bit of help would be good, rather than take my money and send me on my way.
But i knew i could count on you guys, thank you.
Leon