Apparently Principal Radzi is no longer working at HMA, don't know who the new principal is.
The Malaysian law system is very similar to the UK, so try get a UK lawyer to send some threatening letters to them, or a good Malaysian lawyer. You have to be very persistent in this case, and then you'll probably get your money back.
You have to understand these peoples mentality - they are corrupt, but then again if you make enough trouble for them, they will give in, as they just can't be bothered.
I wish you best of luck