This trip was arranged based on your company's promotion of visa-free travel and low costs in Serbia and Bosnia and Herzegovina. We booked a car through your platform, which turned out to be the biggest expense of the trip. We expected that this expense would bring a pleasant experience, but it turned into a headache throughout the journey. We were a group of six and ordered a 7-seater car, but we were given a 5-seater. The staff at the pickup location promised we could switch to a 7-seater the next day. Considering it was already 11 PM when we picked up the car, we decided to take it for the night. However, we were told the next day that we could only switch cars four days later. Our subsequent travel plans included accommodations in Bosnia and Herzegovina, so we couldn't stay in Belgrade for that long. We had to make do with the car, which meant four people cramped in the three seats in the back, causing discomfort and even motion sickness for one of us. When driving out of Serbia, the border police noticed the overloading and held our passports for over an hour. On the way from Mostar to Sarajevo in Bosnia and Herzegovina, we were stopped by police and fined 100 euros for overloading; the officer said the fine was supposed to be 200 euros, so he didn't issue a receipt. We were constantly worried about being fined again for overloading, but fortunately, we weren't stopped at other checkpoints.