I don't trust Avis

I got a rental vehicle through my insurance policy. Received SMS to say my car should be returned to Avis on 13/09/15 at the same time collected. I drive to Tygervalley Avis to drop off the car, only to find them closed. Thanks for letting me know! I then have to call the call centre, who tell me that I need to drop the car off at the CTI Airport, wasting my time and petrol (including in the hired vehicle which I had just filled up). At least the supervisor at the Airport apologised for the inconvenience when I complained to him (Peter at ***).<br> <br> This morning I noticed a charge of R299.99 come of my credit card. This typically happens when I hire a vehicle from Avis. Take my credit card details when I take the car, then charge me a couple of days after I deliver without telling me what I'm being charged for. This time I thought I'd follow up. The R299.99 is a valet charge. Why am I suddenly paying for a valet charge?? I didn't smoke in the car! The car wasn't in a state?? It's this behaviour that makes me not want to ever do business with Avis again. I'm still not even sure if other charges were taken off my credit card.