More than a month after my initial tests and filming with Susann and I still haven't had the material from her, to the extent that she is now ignoring my message. I felt that it is impossible to tackle this problem in a professional way and finally sent a firm but fair message stressing the need for the material. She sent me one edited jpeg.
I find this really unprofessional, but I accept that this is something that I will probably have to encounter a few times in industry and I addressed it in the most professional way that I could.
In the end I got all of the material off of her bar one shoot. It is all unedited, breaking the agreement that we had that she would edit what she had done after she quit.
I in no way blame Susann for being busy and needing to focus on her own work, I do however dislike the way that she handled the situation. I am now behind, have to edit a lot of work and make my videos from scratch. Challenge accepted.