Thank you for returning to us again and really sorry to hear that you feel treated unfairly in your accommodation.
I experienced that food and cooking is a sensitive issue in common shelters like "Wohnheime" and camps. There is often that conflict between needs and wishes of people living there and staff/social workers, who are responsible to enforce the (in Germany sometimes very strict) safety regulations of authorities. Especially in Ramadan, when food and customs are even more important for people, situations are getting complicated.
I am afraid that the Ausländerbehörde will not feel responsible for those kind of issues.
However, many organisations and accommodation managing companies have implemented complaint mechanisms to deal with cases like yours. Maybe you find the opportunity to discuss your problems with specially trained staff, which could take an intermediary role.
If there is no such a complaint mechanism at your location, you might ask for an appointment with the team leader/supervisor of the concerned staff. In any case I would recommend you to communicate respectfully and objectively, in order to achieve a solution on this as soon as possible.
I wish you good luck and please feel free to reach out for us again!
All the best,