I emailed support from a different address and they replied.
I have a theory: I configured my account with an email address that contains a plus sign (+). That character can be tricky to encode in HTTP forms, so I suspect Netcup has a bug in how they handle it.
I managed to fix it myself, but as a paid service, I expect a certain level of support. If Netcup cannot fulfill its promise regarding response times, I don't see the reason for highlighting it on the front page.
First day, I used contact link on CCP (https://www.customercontrolpanel.de/run/kontakt.php).
Second day, I created a ticket on support page (https://helpcenter.netcup.com/en/support).
Third day, I wrote an email to mail@netcup.de.
Today is fourth day. I haven't got answer from any of the channels.
Does netcup have support? How to contact them? They claim "If we receive your ticket before 5pm CET on german weekdays (Mon-Fri), we promise to respond to your request the same day."
