The car rental customer service was a Spanish lady who tried to sell me additional insurance. Despite me showing proof that I had already purchased full coverage, she refused to look at it and exaggeratedly claimed, 'What you bought is yours, what I recommend is mine. If you didn't buy it...!' We firmly and repeatedly emphasized that we would not purchase additional insurance. We resolutely said NO! Then she got a bit angry and ignored me. After a standoff, I asked if I could get the car keys. She responded that it wasn't 3 PM yet, which was my scheduled pickup time. So, I stepped back a few steps, waited for a few minutes, and received a pickup note or possibly a contract. She vaguely pointed to the side with her hand. I assumed I had to get the keys from the neighboring window, but the lady at the neighboring window told me to go to the parking lot at the back to get the car! Apart from the unpleasant experience with the insurance upselling, everything else was fine. If I had accepted her insurance offer, the total cost would have reached 600 Euros, which is double the price!