If the cam broke with the engine running then it is most likely that you now have bent valves and will need a complete valve job. Pull the valve cover and see if you have any lifters that are obviously not in contact with the cam when not lifted by the cam lobes. Even 1 lifter that doesn't maintain contact means the head is coming off. I'd be concerned with damage to the timing covers as well. I'd be holding the shop who did the tensioner liable.