Thanks for your advice.... Already settled with them...... did not calculate all the damages.....as they are unwilling to bear in full. only refunding partial deposit.
I will relay both toilets, polish the living room floor and minor renovate for the kitchen and repaint the whole house.
Dont even assume that Japanese or korean professional are clean. For your info..... they worked in one of the largest company in the world.
Both agents and myself told them not to repeat the same thing again. So I believe the new landlord will not suffer the same as me.