Thanks Calmaman, Leongal and Bukanmain.
I went upstairs and try to 'talk' to the family but they slammed their door on me. These are nasty and uncivilised people indeed.
Cellulose installation seems to work on cooling a house, doesn't seems to work to insullating noises. Moreover, I think it is expensive (sigh..$$). To be honest, I do not wish to invest further into my condo unit as I plan to relocate after the 5 years or when I saved enough $$.
I will try to talk to the management again but they seems to be helpless and oblivion to my sufferings every time I approached them. To them, I am the problem causing guy instead of upstair neighbours. Yet I clear my condo maintenance fees promptly.
Sleep deprivations and constant noises have taken a toll on my health and attention span.
Noises seem to intensified after my 'visit' to their unit. Last night, they banged their bedroom door at 3am++, not sure because of the World Cup or what. Feel like marching up to their house, bang on their door and have a huge argument with them

But I keep telling myself surely there is a better way to resolve this than to argue with people because argument or anger just trigger negative emotions, and in the long run will, I believe, will cause heart problems, hig blood pressure or even cancer.
I moved to another room to sleep (from Master bedroom) but noises are still there.

Why did they make the walls so thin?
Another thing is that they love to drag chairs on the floor. All my chairs are fitted with those rubber sole so that it doesn't make any sounds when dragged.
I am sorry to rant here but I just don't know what to do...I would appreciate any constructive suggestions or any effective actions taken by fellow sufferers like me.