Verb conjugation of "festlegen" in German

It turned out that they did not have a license to house foreigners but I was too tired and besides, where else would I go. Furthermore they insisted that I should not bring prostitutes to their home.
I was a little confused because I recognized the voice and I had booked at Luisa's guest house. She explained me that she was sharing the phone with her neighbor and her neighbor was not honest.
The city was incredibly vivid and we were impressed by its size. We walked a lot through all the different neighborhoods, starting with Recoleta, an upper class neighborhood with its famous cemetery.