Just a very rude and uninterested person has been ...

Just a very rude and uninterested person has been spoken by a 'Mark'. I called for advice and to order the correct part if necessary. He told me that I was a 'private person' and they were at the wrong address and refused to help me further. I asked him how he knew that I was "private" and did not call on behalf of a company. He could hear 'experience'? He then put the receiver down or did not speak to me anymore, at least he did not respond to my questions. Unbelievable. I then wanted to submit my complaint to a customer service or the like, but there is only one telephone number on the entire Einhell site. I don't need to talk to 'Mark' again. Then only something like this remains. Yes what now? "Mark" blocks contact with Einhell. How further. Very disappointed!
Update: Meanwhile, I can express my dissatisfaction with the manager of Einhell Netherlands. They offered their apology and helped me very nicely. Now in possession of advice and part. Thank you for this. The employee is called to account for his behavior. I can confidently rate 1 star to 4 places.