How do i tighten the steering on this type of head? I have acquired a bike (new), but from the shop (supermarket), the steering 
seems to have no effect on the wheels, i thought it was a minor issue i could solve when i got home by tightening, but iv had no luck so far,, 
, the bolts at the sides are for the handle bar, i tried turning the lock nut (discolored in the pics), but nothing is happening. Im now thinking of taking it to a repair shop, is this the right move?
Its a quill stem. 

Remove the rubber/plastic cap from the top and you will see a bolt head, which needs tightening (probably hex). Don't over tighten it.