Bad internet?

Hello, I wanted to ask why my internet hasn't been working for several days, so let's go back to where it started. So it started like this: I was at my boyfriend's for a week and when I got home the builders had finished with our new kitchen. Two days later our internet went bad…

In Fritz!OS, if you have "existing access via WLAN," can you assign a separate network address for the network created by the Fritz-Box?

The Fritz!Box always converts it to 192.168.188.0/24. I'd like to use something else without having to connect a small receiver to the WAN. If I do have to do this, which operating mode would it be? Bridge? Fritz!Box 7390.