Hey @GermanAudioTech !
Thanks for getting in touch, and I am sorry to hear about your situation.
As I would not have access to accounts or stores as mentioned in my response above, I would not be able to comment on your situation. That being said, I believe you may have already tried to appeal this, but it seems like the decision is final. Do you also need to retrieve your 1099K form? Have you looked into other possible payment gateways for your store?