No way of turning off data mode but if you call your provider they should be able to block it better than nothing I guess.
Impossible. They purposefully disable all those settings because they want to to accidentally use data.
Hey Jafar, you can configure the network settings on your Samsung C414 by going to the Connectivity settings menu. In Idle mode, press OK, select Settings, the select Connectivity. You should be able to make various changes from there, including turning off data usage to save on network costs.