**Neither a teacher nor a native speaker.**
Will I not be busy?
Won't I be busy?
Will not I be busy?
Do you not like this?
Don't you like this?
Do not you like this?
You must be careful
"Don't" is okay, "Do not" is not okay in those cases.
Do not touch it!
Don't touch it!
(I hope you can see the difference.)
Timetables, fixed programs, etc -> Simple Present.
The next train arrives at 4:00 pm.
Titanic is on TV on the next sunday.
I'm sure it's okay because the television program is a fixed timetable.
(Yes, scheduled events.)
Student or Learner