You could try and track down where he works and pay a visit. I suggest that you torch is van - preferably with his chavvy mates inside. Then you must visit the offices. Take a selection of semi-automatic weapons and don't leave until all the guys' workmates are dead. Go to his house. Kill his dog, kill his wife, sell his kids into slavery somewhere with no child protection laws. Burn down his house.
Burn down his neighbours houses.
Kill his parents. Kill his brothers and sisters. Kill his cousins and aunties and uncles.
Then you can calmly saw off his hands and feet, blind him with a blunt object and rip out his tongue.
THAT should teach him.