New building and DSL connection

Hi O2 team,

recently I made a new “Mietvertrag” and in that flat I want definitely a Internet connection. 

However, since the flats and the houses newly built and we are the first ones who are moving in to that building/flat, the “Verfügbarkeit” Test on this address says I don't have any DSL connection but only LTE based connections.

However, I prefer to have DSL connection and I think it is possible but since the address is completely new, it seems that it is not registered in the system somehow. 

Thus, could you please check how I can do?

Also, I have a Fritzbox(7560 PE) that was from 1und1, is it possible to used in the connection with O2?

Thanks!