legally, he cant do anythign to make you pay, as no black and white regarding the free stuff. so he was wrong to do it for you without documentation.

on another hand, if you could spend 150k on reno... to save the trouble or fear of him getting gangsters to interfere, just pay him and let him leave.

you'll be lucky if he didnt come back and ask for 10k or more. and perhaps you're already very lucky he didnt run away with your money half way through the reno.

also, the "extras" he did for you, is it really worth 5k?....if yes i suggest just pay him la. sometimes ppl do business also wanna make some money, maybe material price DID increase midway through the reno and cause him to work at a lost.

therefore, like i said...5k, just pay and move on. lesson learnt.

any other way that I don't need to pay him (because I hate this kind of people) and I won't get kacau....I report police first, can? I know where is his house because I have been to his house...