The power steering in my citroen c2 has just failed and i know absolutely nothing about cars!!!help!?

check under the car as you may have a fluid leak, that would stop the power steering from working but whatever it is i'm afraid it's a bit complex to do without a mechanic. best thing to do is go into a citroen garage and ask them what it is just incase it is simple but i think you will be parting with a few quid i'm afraid