I landed in wrong region
Now that I have laid tracks to correct city
How do I change regions?
As I have made new city with my corp
Yet I still can only see old region
If you play a Steam Over Europe or USA (American Dream) scenario you can't change the region, you wiill keep the region you started at. The only way to change region is to delete your avatar, wait for three days until your avatar is removed from the server and start over at the correct region.
The only thing you can change is your home city at all scenario's.