The best seems to be to hand off the hard parts to smaller organisations and allow you to talk to those organisations (technically, the local delivery driver likely is a contractor, but you don't have a direct line or relationship with them).
E.g. when getting warranty repairs for my Thinkpad, dealing with the central Lenovo organisation wasn't great, but once they accepted "customer device has an issue" they pass it off to local service partner, and those (in my experience) deal with issues quite well. And if you don't have on-site support, some repair places take your device and handle the warranty communication for you (and have an established relationship with Lenovo making that easier). Probably not the cheapest possible setup for them though.
E.g. when getting warranty repairs for my Thinkpad, dealing with the central Lenovo organisation wasn't great, but once they accepted "customer device has an issue" they pass it off to local service partner, and those (in my experience) deal with issues quite well. And if you don't have on-site support, some repair places take your device and handle the warranty communication for you (and have an established relationship with Lenovo making that easier). Probably not the cheapest possible setup for them though.