ORBITZ pricey communication debacle customer service,San Salvador; sales, Phillipines Internet

I scheduled a trip through Orbitz online.  I've had many successful experiences w/ Orbitz in the past;  however, not this time.  In scheduling my flight, I found a good fare, but could not find the add a car button.  I booked the flight:  $451.20. 

When I called customer service, reaching a representative in San Salvador, I learned that there was no way to add a car to the flight.  What I should have done was book a package.  Either I had forgotten the protocol, or the format had changed.  There was no add a car option for my ticket.  Had I booked a package, the total cost for flight and car would be $522.00

I was transferred to a sales representative in the Phillipines, who informed me that the cost to add a car would be an additional $367.00 for a total of $818.20 for my trip -- a penalty of $296.20 for seeking the add a car button, not realizing I should have started w/ a package.  I may be, unhappily, hitch-hiking.