@Siggi ******
Since there is an e-visa they cannot force you not to leave anymore, but that does not mean they now have to allow it.
They still have the rule you should stay in the country the whole duration of your application, and they are just allowed to make the rules.
But you seem to know they don't have that rule and suggest they are not allowed to make those rules.
You seem to think Thai autorities don't have much rights, immigration not allowed to check financial situation of people, MFA not allowed to set rules for visa application and so on.
Where did you find these nonsense?
I think Thai authorities have much more rights than you seem to think, civil rights are less than in a lot of other countries...