Staff overselling upgrades and unable to process deposit due to machine error twice

I was upgraded to a medium-sized car because the car I'd booked needed extra cleaning. They were great about explaining the car's controls and how to return the car out of hours. No pressure to pay for extra insurance or anything like that either.

Everything was great and smooth!

After a long haul overnight flight I was horrified to find almost 20 people in front of me waiting to collect a car. The process took almost 1.5 hours. The staff were polite but there were just 3 people working and a wait of this length was extremely frustrating and totally unacceptable. Poor show and very unprofessional for an international company.