The insurance upsell was actually fine, but the biggest issue was the wrong return address. We were told at pick-up that it was at T2, so we went there early and searched for a long time only to find the counter was closed. After calling, we found out it was at T1. Paying for parking was a minor issue; the main problem was going through security, finding the counter, and making calls, which took us half an hour. Fortunately, we arrived early; otherwise, we would have missed our flight. When we complained to the staff, they were indifferent and simply said it was wrong, which was really frustrating!