The store messed up the return date. We clearly booked to return the car on the 28th, but the contract said the 25th. We only found out when we got back. Called the rental company but didn't get it resolved. Had to go back to the airport the next day to sort it out. The store even falsely claimed that our main driver requested the change. Finally, after several calls, we got a new contract. The website quoted 431 euros, but the contract charged us 700. Besides the additional driver and cross-border fees which we were aware of, the rest was just unclear charges.