this one opposite giant and beside got MTR3 station, nanti runtuh mrt pun koyak 

How to estimate 200~300k basing on just photos and videos without knowing the reason or even cause?

Why is PSP and not only SP coz this is under structural if it's design loading and material as what you mentioned? Why design issue also fall under RE scope?

If it's you, you will rectify first. But how do you know the people are not rectifying first?

What is sheer crack? Why isn't it Shear crack?
And if it's Shear crack, how does the wall fail in shear when bending and compression is always the most critical force instead of shear?

From photo I really can't. So I do admire and amazed by your confident in quoting RM200k for repair. Coz I can't see the extent of damage, how many floors, what is affected, and doesn't even know the cause. No original drawings, no details, no BQ, no proposal or rectification details and yet you can figure out the cost of repair.
You're really a very experienced person with high technical and management knowledge with know-how of the in and outs of construction.

I do not understand how Sheer Wall design as I normally heard it them as Shear Walls. Would you be so kind hearted to enlightened us how "Sheer" Wall works? And how do you know the failure is from load bearing?