Hey,
I understand your frustration over all these. My renovation was done by Johnson and along the ways definitely there's argument and unhappiness, but we overcome all those and I am happy with his workmanship.
After sales service by him also quite good as he responded to my call and rectify the defects quite fast even though some defects not covered by the agreement signed.
I strongly against people badmouthing eachother as all of us here are just making a living.
Cheers