|my colleags are using internet , and there is no one to help me .|
Listen, I don't believe for a minute there is no one to help you. Someone, or some company, has to take care of your computers and network.
I recommend at this point you talk to your boss and ask him/her for internet access. If they feel you need it, they'll contact whomever and make it happen.
I suspect there's a reason you don't have internet and you're really asking us to help you hack your network..........which we won't do.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.