This is not the right platform for the requests itself, but your questions may be answered as well.
I have done that with several authorities. When I remember it correctly every single one lied to me. It is law, that they are allowed to lie under certain circumstances (§ 57 BDSG). I had to tell them, I know from other sources more than they tell me, it was a constant “Here some breadcrums” and my answer “You know more”.
You have be fast in answering and you have to do the answers correctly labeled: “Widerspruch” within one month. They lied again, all of them. So next round you have to go to court within one month. But it has to be the right court. Even the authorities normally don’t know the right court… And even the court may say “Oh no, this is not the right court for that.” Once I had to go to the upper court, which then said that the lower court was wrong…
So you have to have a long breath. You have to be fluent in German and you have to read German comments on law. You always have to proof against the authorities, that you are yourself, that you have the right and that the right is interpreted as stated in the comments and they still get in wrong.
I began in 2021 with questions, the court processes at courts are still ongoing.
The court Verwaltungsgericht Köln is the right one for questions about “Financial Investigation Unit”. I think we exchanged already 12 question-letters and 12-answer-letters by proxy court in the last years. Now the newest idea of them is: “We have deleted everything about you.” I just answered: “You mention my name in this letter. Everything cannot be true.” Just got a letter yesterday: “Oh, we have to ask a lot in house about the data-deletion, we need more time.”
And I learned about “Ermittlungssachen” and a lot of “just saved for years, just in case” against me, I didn’t want to know.
You will not become happier by doing this over the next years. And I am not ready yet. The court cases are still “running”. In some years judges will have a look at my cases… And they will have to say: What are we talking about? It’s long time ago and already deleted. You want to talk about data stored about you now? Than start the process again.”
When they give you data, it’s often wrongly typed. They do not copy the data, they retype them for you. And therein are a lot of typos…
Not to forget that the programs they use are a mess. Just have some court cases, because they have wrongly saved data about me. The best part is: “No, the data is not wrong, we have taken this as the actual data from that program. The data just sais, that the program said xxx. And this information is correct. So there is nothing wrong!” They really use “inright” and “notwrong” to make differences between different levels of wrongness…
And sometimes you get informations, you wanna puke. I got a list from one authority, that there is about 2 accesses of my data per day over the last years. I just ignored it and didn’t go to argue, that it cannot be lawfully allowed, to do so.