Damaged car provided, had to incur additional costs

Me and my wife rented a car from Europcar. While driving it, I was waved down by another driver who told me the back right wheel was wobbling. It was obvious that there was damage to the wheel, and we concluded that the car will not be safe to drive further. I was already late, and Europcar couldn't send someone to bring a new car at the time, I thus had to make alternative arrangements at my own cost.

After coming back, Europcar did provide me with a different car for the rest of our visit, but they still charged us for the rental, discounting a single day's rental. Considering the effort and cost that we had to incur because Europcar gave us a damaged, unchecked car, my expectation was at least that they cover that additional cost once I had explained it to them.