Sixt Car Rental

The airport at Bologna is not too large and there a couple of different car rentals available (all located at the same row of desks). When we booked our weekend trip to Verona, we found a pretty good deal for a small car at Sixt, so we decided to try Sixt. We landed around 22:15 in Verona and because we only had carry on luggage, we could walk right to the desk of Sixt.
When we arrived at the desk, nobody was sitting there and there wasn’t even a note stating were the person was and what time he/​she would be back. All the other car rental companies had at least one person at the desk, while other persons were at the garage. At Sixt, all of this was done by one person (but without any communication to the customer :()
Fortunately, after 15 minutes, somebody arrived and we were helped quickly after that and were very happy with our Fiat 500 we got :)
Finally, when handing in the car at the end of the weekend, it showed that the missing person at the desk was not just a one-​time thing: again there was nobody at the sixt desk, while there always was at least one person at all the other desks… Again we had to wait for about 15 minutes for the person to arrive.
For companies like this, I don’t understand that they don’t communicate clearly to their customers. Best would be to at least always have a person sitting at the desk that can help people…