Well if you are on the 20th floor, what I already proved to be wrong, you can easily ask the other 2 companies on that floor for my phone number and call me back. loqio GmbH called me back yesterday so it would be easy for you to go few steps to your neighbor for the number and call me back.
And no matter how many times you repeat it, it is not possible for me to visit a non existing company. By the way, office buildings usually have no open door so I have to ring the doorbell but there is no bell with your name, as it can be seen on my photo, because you are not there.
Take your smartphone, start video at the front door where I have taken the photo and go upstairs to your office. This will take 5 minutes.
Some people reacted on Telegram on my message. They can confirm that there has not been any spam. Who is your community manager, do you have a phone number? What about your own phone number? Let me call you. You probably have a landline phone in your office.