Party does not respond or hardly responds to repea...

Party does not respond or hardly responds to repeated e-mails, does not have its own administration in order, so you are stubbornly stuck with e-mails stating that you still have to pay while this has long been done. To top it off, after we paid the last installment more than a year ago, we suddenly come up with collection costs that have never been mentioned before. Whether they can also be paid within 5 days. Totally worthless, not transparent, and if you ask for clarification, they don't give home.