As much as I empathise on whats happening to you, there are some reality checks here :
1) When you buy things overseas, you know you are taking on some risks when it comes to post sales situation.
2) Most if not all vendors, they dont have unified or streamline post sales services like APPLE : meaning regardless where you bought your device, you cant just send it in to the local service center and expect them to service you as if you are a local customer. This due to costing, tax and accounting issues. Eg how do you account for a device that is sold in china where the profit is "localised".
3) I personally have purchased things from overseas and I either send it back to the dealer who sold me the device and wait or I talk to the manufacturer and deal with them direct. Either ways, I have to incur more costs (shippings etc) and (waiting) time.
There are always some exceptions but those are far and few. There's nothing to be disappointing once you understand how things work and manage your expectations.
PS : I am very sure that you probably got your SPK at a much cheaper price in china as compared to buying them in US.....so there you go