I heard they don't like the smell of camphor so a few moth balls in their runs should stop them. You can buy various traps which kill them, although its quite difficult for the novice to p[lace them.
There are various electronic repellers but I am not sure if they work or not. One of our neighbours sticks small windmills (the type children run around with) in the lawn near the runs and he said the noise of the blades spinning keeps moles away.
Last resort., professional mole catcher. Probably expensive but will get rid of them for you.
Good luck with them.