thats just seriously WRONG, lord knows how they could even think of leaving it like that is beyond me, i know my temper and that would have been ripped out within hours of getting home (yes i know it might not be legal) but i would have gone berserk.
I still would get them to move the cable, after all they shouldn't have put it through their i the first place, remove cable and re-turf the lawn and some compensation for all your hastle is a minimum you should be after
