Turning off water under sink

[Fliprollsw]

Morning,
Moved house a few months ago and first issue is having a slight leak on tap in kitchen. Went under sink to turn off water and there are four valves I can see as per attached photos. Tried turning all clockwise 90 degrees as per usual but water still coming out of tap. Am I missing something or doing wrong? The metal valve I turned with the flat headed screwdriver is to cold but can’t see a similar one for the hot water, just the plastic valve.

 

[ShaunCorbs]

There’s no valves on the kitchen tap eg right hand two pipes that go upto the tap

So combi boiler or copper cylinder?

 

[Deleted member 120897]

You’re turning the wrong ones, they’re washing machine valves and a garden tap isolation valve, either higher up as Shaun says or perhaps where there’s some round cutouts of the back panel.