Everything went well including the extension to the hire. The extension was completed very quickly and I was calling on my mobile from the States.
About the service from the local car rental company
Bit of a disaster. They had no car for me and would only upgrade me to a larger car if I paid for it. I stated that I did not want to pay for the upgrade, so they managed to borrow a car from Hertz.
The extension was also a disaster. They obviously did not process the extension and I received a phone call saying that I had not returned the car and that the car would be reported as stolen. I called Dollar to explain the situation to them and accepted my response. However, I had to wait 40 mins for them to answer the phone. Once again on my mobile.