Dear @Lydia,
Welcome back to the Wefugees Community and thank you for reaching out to us again.
If the Jobcenter was already paying an allowance for the new born over the last 7 months, it is correct to deduct the money now and they can ask for the refund of the paid money from the Agentur für Arbeit (Kindergeldkasse) - not from you! Sometimes it’s a bit irritating and people receive a letter for their information only but which is actually addressing the Agentur für Arbeit (asking for the refund).
If the Jobcenter didn’t pay any allowance for the newborn, it can not ask for a refund for the last months - it is correct, though, to deduct the money from the newborn‘s allowance as soon as you actually receive the Kindergeld.
As this process can get really complicated, I advise you to take your papers to a counseling office and together you can calculate everything and make sure that no money gets lost. In Eschweiler, there is an AWO-Office, for instance. Just follow the link for the contact details.
I hope this helps and please don’t hesitate to get back to us with any further questions.
All the best,
Meike PS.: I saw that you opened another thread about this. In order to keep a better overview and information in one place, I will close it. I hope it’s okay for you.