Epi I've had that message before on my accounts. I have a good feeling you are not banned but that there is a problem with the login server. The server where I play now, Crushbone, regularly has that problem.
If you were banned I think when you got past the patcher you would probably see a message stating that your account is banned. Or possibly as you would try to access the patcher.
There is a phone number for SOE customer support. If you need it please reply and I will post it so that your dad can call SOE CS in San Diego.
Cheers!
Kess
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"Behold, I am sending you like sheep in the midst of wolves; so be shrewd as serpents and simple as doves"

Enter through the narrow gate, for the gate is wide and the road broad that leads to destruction, and those who enter through it are many. How narrow the gate and constricted the road that leads to life. And those who find it are few.