Hi Guthrum!
Welcome to AA!
By your description Heimal does seem not to have ample trust in you. (You most likely unintentionally did something to make her loose her trust in you, or she never trusted you enough in the first place).
With patience and persistance all this can be dealt with
.
Make sure she is comfortable in her surrondings and has enough "safe places". Remove anything she isn't really comfortable with. Set up a daily routine.
Try to observe your bird, to the point that you are sure you're not invading her comfort zone and try not to do stuff that scare her. If she gets really scared of something stop doing it immediately.
Make sure that every time she steps up she does so willingly (reinforced with lots of praise and a favourite treat). One really good step up a day is better than a thousand failed attempts.
Have you considered target and clicker training as a bridge in communication?
When she does fly to you remain completely still and talk very softly to her. With enough repetitions (of her choosing) she'll learn that you're nice to hang out with and will want more.
Each bird is an individual, like we are and some just never like to be handeled.
Let go of the expectations you have for her and enyoj her for what she is. In time and with patience you will both have grown.
good read on what khizz is doing with her birds..
and
progress
Goodluck!