how do I unsubscribe to Kings.com, Yahoo games as I did not know I had to

[[email protected]]

pay for this and do not want to use? Iplayed a game via Yahoo and I signed in, it came up with King.com and a page ame up with buy £10.00 for £5.00 for games. I do not want to subscribe or by partof this site. How can I unsubscribe.