If that don't help please contact your seller to exchange the device.
Are you seriously? Of course that don't help. A lot of people did it many times.
I have the same touch screen FT5406_MT, VER:0x1e.
The order date is 18 Aug 2016.
And I have the same issue since updated to 0517 firmware.
All my friends which have BV6000 just did not update the firmware and still are using Android 6.
If I understand correctly, you do not plan to fix the drivers in the current firmware (Android 7) for the touchscreens of the first batch. Right?