Which courier company to use to ship a package to Hong Kong?

I'm trying to send a home security camera (Canary.is) to Hongkong for free replacement. The company has even offered me to reimburse the shipping charges. It was one of the devices that burnt in lighting. The issue is I'm unable to find a courier service that accept a package from individual for international shipment. I tried fedex & DHL, both wants me to have a corporate account with them. Speedpost is the most stupidest, said my parcel will get stuck at the shipment and thus they would not accept it.

Has anyone sent something abroad in the past ? kindly guide me how and through which courier ?

thanks.