Welcome back to the Wefugees Community and thank you for reaching out to us.
I would recommend to contact the so-called „Verbraucherzentrale“ in Munich and explain the situation. They are specialized in customer rights etc.
Please follow the link for the contact details and more information. In Berlin, for instance, they charge a minor fee for the consultation (around 15 Euros). Their website is saying that due to Corona they give advisory services on the phone. So maybe it makes sense to call them with someone who speaks German well also.
I hope they can help and please don’t hesitate to get back to us with any further questions.
All the best,