Airline Botch up causing R7500 for trip

I booked a flight online which was for Air Seychelles, a subsidiary of Etihad airways. On check-in I was advised that the visa documentation did not match my passport details that they would contact the Indian embassy and try to sort it out. It was a case of a 0 which had been saved as a O so looked exactly the same to the untrained eye and obviously the Indian embassy had done so in error. To cut a long story short, I was denied boarding being told that I could ring them the next day, there were seats available so I could fly the following day at no extra charge. Well of course that never happened! Air Seychelles would not even try to help me and Etihad booked a new flight at an extra R5000 which is almost the cost of the initial flight. Not only did I get the wrong information fed to me but was charged a huge upgrade fee for something which was not necessary as you can get a visa on arrival in India anyway and the Visa that I had had been stamped as "APPROVED'! This not only cost me the extra flight charge but a new local flight in India of R1800 and an extra transfer of R700 plus missing the first day of a really expensive retreat! Add serious food poisoning to that on the return flight, resulting in a fainting incident and it was a seriously bad experience! One very unhappy traveller! Dione