Incorrect ticket

i went into checkers overport city on Saterday 18th of July to purchase a ticket to Cape Town for the next day for my son a student who had to be back at campus on the 20th. The ladt quoted me r3600 for that ticket and as i didnt have my glasses asked her to check my ticket which she assured me was a ticket to cape town for the 19th . When we got to the airport on the 19th we discover that the flight was for Johannesberg on the 19th and another flight from jhb to ct on the 20th. Furious and desperate I went to the SAA counter and had to pay another R1900 to change the jhb flight for tthe 19th. On Tuesday morning I went to checkers and spoke to the manager who called the lady who sold me the ticket who clearly confessed not knowing about what she had booked. She had no idea that she had booked to ct via jhb and said that yes she was askd to check the ticket which she claims she did as i had no glasses. I was than asked to leave the matter in their hands as I wanted some compensation for all the inconvenience and stress and paying over R6000 for a ticket to ct. Checking up on the matter during the week I was told will take about 6 weeks. I am still waiting.