Avis Car Hire

Avis Cape Town Airport Rental agreement #*** Avis Preferred - J4P643 Booking paid upfront for 7 days and on collection the agent was told booking change would be for 6 days, the agent said no problem, when vehicle returned, the system would credit any amount due for the 1 day not used. Now I find out from Avis that (hidden) in their T&C’s it says no refunds for any unused days? Now Avis cannot say who the agent was that assisted me and gave the incorrect information? So now I know never to pay in advance for any booking as your plans might change and you end up loosing and Avis gains the extra days. So disappointed in another corporate ****ming their loyal clients.