Any news would be better news by the sound of things :lol: They think if they ignore you will go away. Unfortunately confrontation is the only way to get things done. Emails are a waste of time, same with phone calls. They are always in a meeting, with a client, just popped out etc.
On a similar vein, I had a query with a new dashcam, so emailed the manufacturer, in China on Sunday & by 8am Monday they had replied to all my queries. Top class service, that's how it should be done