Second-hand laptop stuck in previous owner's Windows Autopilot tenant – how to reach human support?

Very same issue here joelmatejka​ . Contacted the company to ask them to remove the device from Autopilot (gave them S/N of my laptop), but so far no reply from them unfortunately.

Could Microsoft please provide a solution in case company doesn't reply to our Autopilot unlisting request ?

Aren't we going to have an ever growing number of devices with stale Autopilot registrations waiting to be removed ? How to provide a better way to deal with this if the company doesn't reply ?

Many thanks