I will take stab at it.
As i read it you are a photographer that hired a model, this model also seems to have her own Photographer (manager?). You took the photos before getting a model release and then asked for one afterwards, the model and/or her "photog manager are not willing to sign a release.
QUESTION: Did you know of this other photog/manager before the shoot and did you sing anything giving the model the rights to your photos.
If you did sign anything then you own the rights to your own work, you can not sell them if the model is not willing to sign a release and conversely the model/photog/manager also can not use or sell them. I am not a attorney nor do i play one on the internet and i am only speaking of my limited knowledge of United States laws and you will need to consult a legal advisor in your country.
I would tell her that you are the owner of the photos and you would like to sell the photos, you can propose to share a percentage of the profits or limited usage rights IF THAT IS SOMETHING YOU ARE WILLING TO DO, if she says no then you tell her she also has no rights to your work and that you will pursue legal action if she attempts to use them with out your permission. ( i say this because i get the sense from your post that she want to use/sell your photos.)
Do not let them intimidate you, learn your rights and assert them. Make it clear that you are not going to be pushed around and are perfectly willing to work with them if they are considerate and reasonable.
As stated by others the translation into english is very poor and confusing and i could be reading it incorrectly.
EDIT: The title of your question implies that you did indeed give the rights to the photog manager or they are asserting that they do in fact own the rights. YOU NEED TO CLARIFY THIS TO US AND TO GET HELP IN REWRITING YOUR QUESTION IN ENGLISH.