No consideration for your customers

I got this email today and I've already made my car booking plans to meet my rental company at three pm on the flight date now suddenly times have changed called your call centre telling me if I choose an early time I will have to pay more *** for guy when your the ones that made changes when your the ones that have problems with your flights. I'm not happy that I'm told I need to pay R300 for an early time whereby I did my bookings and plans in time then this Hey.... We try at all costs to avoid rescheduling flights, but unfortunately, due to operational constraints, we are sometimes forced to make these changes. Unfortunately these changes have had an impact on your flight⁄s. We apologise for any inconvenience this may cause.