Book National car hires in Orlando

Cons: Reservation was not available they manager said we will not honor it because we have to many people customers

Cons: I traveled for business and processed this reservation online through Kayak with a business card. When I landed at the airport to pick up my rental car, the woman at the counter informed me it was not paid for just "reserved" and they couldn't charge the same card. A rental car for an entire week is A LOT of money to pay when you are under the assumption it is already paid for. This was definitely not communicated clearly in the booking process. I have rented cars several other times at a variety of places and this was not the process previously. When I returned the car to the airport, not a single counter was manned. All counters had signs pointing to each other saying "if no one is at this counter please go to the (insert company name here) counter".....but nobody was there. I finally settled on putting the keys for my National rental in the Enterprise dropbox on the counter because it was the only safe way to return it.