If these emails were received on your portal then just do as they say, you'll get your letter soon enough. The attitude and the way the emails were written may just be due to the fact that the person from the DAAD contacting you has limited english ? Or that they keep getting new information from their higher ups so the info they send you keeps changing ?
On a different note, if these emails were received on your private email, then that's weird and there could be an issue there, so don't send your private information unless it's on the portal. Also, I think you should call the DAAD office in Bonn to make sure (By the way it should be someone from the DAAD office in Bonn who should let you know about the award letter and whether you got the scholarship or not) , ask to speak with the person responsible for your region and let them know that you've received consecutive emails and you're not sure how to proceed from here and what you should do.
Best of luck.