Thrifty tripped my holiday plans.

So I booked a 8 VW/H1 seater automatic in early November and total amount was 12thousand rand. Early December I confirmed the booking only to find out the booking was incorrect captured. The lady that assisted me booked a 10 searer quantum manual. I called for full 5 days and no manger was available. I managed last week to get hold of a manager whom correct the booking however I have to pay 17thousand. What kind of a company is this ? There is no monitor, staff speak ill off others, on told me Lee is just a receptionist and knows nothing's. Im seriously hopeless and disappointed.