Welcome back to Wefugees Community and thank you for reaching out to us.
I am sorry to hear that you feel so stressed. However, I think it is hardly possible to assess your situation and the immigration office's intention here - especially without knowing your story and your conditions in detail. Hiding and panicking might not be the best or a sustainable solution in general. I would highly recommend you to contact, for instance, the Refugee Council Munich or the Refugee Council Bavaria to get some individual support. I am sure the local counsellors are also familiar with the type of letter you received as well as the particular work practices of the immigration office in Munich (München). Therefore, they can give you a more profound and reliable advice and together you can decide on your perspectives and nex steps.
Nevertheless, please also don't hesitate to get back to us with any further questions.
All the best,
PS.: I saw that you opened another thread with the same question. In order to keep a better overview and information in one place, I will close that one. I hope it is okay for you.