It is unfortunate that you sent to the wrong place (I don't know how that happened).
International support should go through local dealer/distributor first, and then sent to Taiwan factory for service if local help is not available. Typically repair service doesn't go to TDSS unless it is from North America, and local distributor is not able to perform the service.
I don't know why TDSS asked you to send to USA. In any case, please contact email@example.com, with the Help Desk ticket ID. I believe your IDA-8 should be with US distributor, Brand Uprise.
I think I remember seeing your email. Again, contact support for help, and I will ask Jye who is the support manager to follow up with Brand Uprise. Furthermore, have a help desk ticket available so the incident can remain open.
Thanks for airing your grievances here to get my attention.