new to sirius xm

hey guys!

I'm having a hard time with the installed radio in the new car I got
I called Sirius xm to activate the service yesterday and until now all I get is the preview channel
The rep I spoke told me that they have refreshed the signal and my radio should be able to get the channels as long as I make sure that my antenna has a clear view to the sky. He asked me to turn off the radio and my car engine for a while and then turn it on again but it was no good. He also made me open and close the driver's side door (what's up with that?!)

Can you guys tell me what I should do? :confused:
I mean I'm not sure whether the guy on the phone is giving me the correct troubleshooting
I want to enjoy the trial service...hope I can get answers soon