From airport to hotel and back, didn't dare to drive the car. Almost got attacked while renting, if

Car was fine. At pick-up was forced to pay extra insurance or they wouldn't let us take the car at all. Felt like we were scammed. Car also only had quarter tank of fuel when email said full to full.

When I arrived in the agency I had since the beginnin a bad reception, the agent didn't even say good morning or reply my "hi", he simply asked: "drivers license, id and credit card." I provided all the required document then he asked me how much it was the deposit to pick up the car, I thought this was his job, right? In the voucher was saying between 500 and 3.000US Dollars, So he decided out of nowhere choose the amount of 2500EUR. Already telling me: "you don't have limit in this card right?" Seriously? Why would I plan a trip, book a hotel, get a taxi, cross the whole city to pick up the car if I didn't have limit on my credit card? So he didn't show me how he inserted the amount on the card machine, only asked me to enter the PIN. Then it said no authorized. The agent then turn his back and left me there alone, not willing to help or sort the issue out. I called the bank then, put the speaker on and with the bank agent asked the guys from the rental place to try once again(2nd time) but again he hid the machine and only asked me later on to put the pin and again not authorized asked the bank agent who I kept on the line if there was any transaction or ate least an attempt of it in their system. The answer was loud and clear(NO, on the bank end no transaction was showing up.). So instead try to use another machine, request another credit card or even turn it off and on he just said he wouldn't try again because HIS MACHINE would be blocked, machines does not get blocked because credit card insufficient found or anything like that. He told me then:"Rent the car in another company" Then curiously when I left his cabin there was a colleague of his from another agency offering me another car to rent! Now I need to keep my eyes close to my credit card account to make sure he won't use to charge me or buy something else later on because I already lose money with the booked hotel, the transportation to the car rent pl