Easyjet car hire cancellation

[mike80]

Does anybody know how to do this on their website? I need to amend a flight, and with it the car hire. The flight is easy enough but you have to cancel the car completely and then rebook it for the new dates. Unfortunately the help system seems to refer to a different version of the website...

Anybody have an idea? It's going to cost me anyway, I don't want to pay them more on hold to their call centre!!