Couple of points:
1. I find it 
hard to understand how a woman who is "
not at all attractive and sexy" (i.e. 
not even 
1% sexy, or simply has 
zero sex appeal) can 
possibly attract any man to 
sexually harass her. 
If you leave out "sexual" and just stick to "harass" alone, it might make 
a bit more sense (even though I still 
don't think you were harassed 
in any way in those 
specific situations you described).
2. In my opinion, your so-called "malicious Malaysian neighbor and surrounding houses renovation workers" were whistling because of 
other reasons that had 
nothing to do with you, 
no matter how many times you saw and heard them whistle.
Another couple of points:
1. It's 
possible that you were the target, but it's also possible that you were 
not the target, right?
2. Even 
if you were really the target, you still did 
not see exactly who whistled at you, right?
Nor do you have any 
proof that the "culprit" was indeed that "low class sinkie Malay", right?
It could have been 
someone else whistling 
at you, right?