We asked for their help because the apartment we rented out was full of mildew everywhere - the obtrusive smell and the living funghi on the walls all around the flat was evident. We have paid out the full amount in advance, and the owner refused to talk about it ("Das ist normal!"). We would have needed to move out immediately, e.g. because we had a 6-month-old just about to recover from obstructive bronchitis, and we couldn't sleep during the night because of the penetrant air.
When we contacted them, and asked for assistance in finding another flat and refund, they refused it, saying they have nothing to do with these kind of issues. Later on I found their terms and conditions, and it was clearly stated there that we would have been eligible for that - so demanded for recompensation again. They just kept on saying that mildew is a matter of cleanliness, and we shouldn't expect any kind of help or recompensation from them regarding this.
So if you think you pay the service fee for some kind of protection or service, be prepared that if you have any kind of issue, they just shake you off despite all the evidence!
Look at the photos: Do you think it's a matter of cleaning? Would you have your baby (who even has a respiratory disease) stay under these conditions? Would you let down a baby with a severe respiratory disease like this?