Disconnecting an old washing machine?

I'm having a new washing machine delivered tomorrow but don't seem to be able to disconnect my old one without flooding everywhere. I don't have the black cut of switches on the pipes from my washing machine so don't know how to disconnect it without flooding the place. I turned the mains water off but water still kept pouring out of the mains pipe. Not sure where I'm going wrong so I've reconnected it for now. Can anyone help.

Angela
March 2011