Pay for auto and receive manual

Terrible service, pay for 1 type of car and receive another. I paid almost R1000 extra to have an automatic, when I reach the capetown airport they say they don't have automatics, but they will see what they can do by the next day. Next day comes I realize they have given me a **** number to call to arrange the swap over. This is pathetic customer service. I should be refunded for all the days I am forced to use a cheaper car that I didnt ask for which is not automatic. This is specifically directly towards thrifty car rentals (sani) Capetown.