False advertising price dont include car rental

I compare prices for flights and car rental<br> Flysafair was cheaper with about R1500 compared to Mango and kulula<br> When you book your flight the website add the cost and when you add car rental it show the car is included and give you a total to pay. <br> When I phone the car rental company to add a baby seat to my shock they indicated that I have not pay for the car. This cheap price was only for flights and you still need to pay for you car however it is included on the total cost per booking on the intranet.<br> <br> If I knew this Mango and Kulula would have been more than R1500 cheaper!!<br>