Sorry for English post... my German is not good yet.

Technicians failed to install my internet today because my home address is different from the actual address of the connection. I live in a big apartment complex, and all the cables are actually connected to the neighboring address.

The technician told me that I have to change my address. I went to this URL https://www.telekom.de/hilfe/vertrag-rechnung/vertrag/aenderung/adressaenderung to change my address, but I cannot find where I can set a different connection address from my home address.

Can you help me on this?