Help with sprint service

[Shavkat]

Hi, i need to turn off roaming and active sprint service.
But i can't do it because i should active from sprint first.
(Service Provider's tech told me that i must active some kind of codes from sprint)
Like i understand i must ask sprint to active it right?
If yes, can i contact sprint service via e-mail or VoIP?
Reason is: I can't call to sprint service. And can't active international calling too.
Please can any1 tell me more about sprint account active?
I don't understand things like this.
I need to use Sprint Service not roaming.
I'm having connection problems with roaming.
I'm at [1X] (don't know that helps)