Update:

Update:
After weeks of not responding to any of my attempts to contact me, I've finally got my outstanding and legally due money back.
The behavior of this company is still incredible. Either it is intentional or the internal structures are so inefficient that they have to be completely renewed.
I have had very good experiences with Airbnb. Here at Corona weddings I got a 100% refund within a few days after a one-time request.

I can only agree with the many negative reviews here, have also been ripped off. For me, the behavior of TUI Wolters is intentional. Don't book there, your money will be collected and you will never hear anything from this company again!