Office 2019 downloaded, but Office 365 installed. How to change?

I have a new notebook. All Microsoft Office programs were preinstalled on it. Since I bought a license in advance with a key of Office 2019 standard for 2 computers, I wanted to install the included Office programs on it. On the PC (with Windows 10 Pro, as well as the notebook now) went without problems.

The preinstalled programs were not listed in the Control Panel under Programs, so I could not delete them there.
I then removed it from the list that opens when you click on the Windows icon in the task bar on the left. Right-click on any program (such as Word, Outlook), then click "Disable", and they were gone.

After that, the NB restarted, Office 2019 Standard downloaded, and when that was done, came the message that everything was activated.
Actually, I would have then type in the key.
If I now open Outlook, it says "Outlook 365". I do not want to have that. Apparently there were still some leftovers on the notebook.

What am I supposed to do now? How can I get away 365 and the "stationary" Office 2019 on it?

Two possibilities:

Call MS Support or log in via chat

Uninstall everything and then reinstall. Vielpelicht you find in Settings Applications a way to remove ONLY the unwanted. That this works is not certain.

Thanks, I'll try it that way.