Hi Benlinz,
We had that problem where I live and what I did was contact our local CP. I collected a trap and I trapped them gradually, I took them to the vets to get them spayed/neutered . It has taken a while to get them all and I think there are still a couple around. I didn't attempt to tame them, some kittens were found homes for but majority were released and three of us care for them I would say they are semi-feral now as they know us so well.