I wouldn't bother trying to call customer support, i'd take it back to the shop!
I had issues with a Blackberry I bought for my son. I could get GSM, but not GPRS, so no internet.
The shop took the SIM out and did some stuff, then reinstrted the SIM, but this didn't allow the SIM to register.
I don't know what it was they did, but the issue was that the card was not registering correctly and they told me the SIM was registered in France (despite it never being used there ever!).
THe matter was eventually resolved by making changes at the provider's server(s).
Go into the shop ant let them deal with it.