Can try the following
Kroll Ontrack for its worldwide largest data recovery network and high professional standards.
CBL Technologies for its free evaluation and medium size local sme and free evaluation
Accplus Technologies for its small outfit, low price and personal service.
All these three have the ability with experienced staff, clean room facilty and professional tools to handle your case.
thanks for the recommendation.
eventually I went to Accplus because after calling multiple companies, Accplus is the only one that is able to give me a satisfactory answer to my various queries.
When I went down to their office, he did a preliminary evaluation on the hard disk immediately. And since I had some technical background, he explained to me what the potential issue is and the solution to it.
By evening, he completed a proper evaluation and updated me on the status. Thanks goodness, it is just the firmware that is dead. With that, he went on to clone the data onto another hdd.
All this is completed within two days which is considered very fast as other vendors had quoted that they need at least a week to do it.
lastly he is very friendly and even advised me on a more efficient way of doing backup for data.