Yes, definitely stick with Intel technical support. There is a long series of scripts they can run to recover the data. We do have phone centers open around the world - Indonesia isn't listed specifically, but you should be able to find a close match at http://www.intel.com/support/9089.htm
- if you have backup of the data that is on the storage, just take out the drives while the system is powered off, then start it and upgrade the firmware as described in release notes for the firmware update. this will not bring your data(the operation is data destructive as the new FW handles differently folders so everything will be deleted) back but you will have the system back operational. is good after the update to insert each disk after another and always do a scan, this will allow you in 90% to recreate the raid with the old drives. if not you will have to clear the master boot record and try again then. Sometimes these devices are little bit stubborn if there is info about existing raid in the MBR.
- if you do not have a backup of the data, you will need to send it in to Intel for data recovery(actually Intel support will only restore the configuration on the device as there is just lost the path to the stored data which makes the whole system inaccessible, it's done over the serial connector onboard). just tell to the people on the support center that you have the issue with lost access and that you need a recovery of the system and they should already know because it's a very often case.