Was insulted by employees in Stuttgart.

Was insulted by employees in Stuttgart.
This employee constantly "chats" me whether I should have noticed whether his friend has a blue tick on Instagram. After the fourth time, there was an answer from me asking if it was customary to get annoyed with so much nonsense here. I was insulted and threatened with beatings if I again disrespected the employee. I have often been a customer and even have a platinum card, but in Stuttgart I was in Breuninger for the last time.
Greetings Axel Gerst