Cursing on the phone because I spoke English

I am getting calls from a number for 2-3 days now, I call them back but goes to message. Today finally I caught the call, the lady on the phone said my name I said yeah and she started speaking German. I understand German but I am still pretty beginner and I asked in English who they are, she started cursing and then saying that this isn’t England this is Germany and I should speak German not English and she hung up (edit: the irony is she said it in German and I understood every single word)🤣I mean anyone knows me know that I can not speak German but this mysterious lady, who knows my name, my number, does not know that and after calling me 6-7 times she curses and hungs up. Did anyone had something similar? What is this did AFD started calling people to make them leave?😂

Edit: I am getting a lot of downvotes and I literally don’t know what I did here, not disrespected anyone, am actively learning German but I am not proficient yet, and the number did not seem like a company so I have answered in English, not disrespected the lady who called me 6-7 time and then cursed and hung up on me. Other than that I am just trying to change the negative experience I had to a funny one so that it does not ruin my whole weekend. So instead of giving dowvotes why don’t you just write what you are angry about so I can answer if I know the answer?