Flight Centre passing the buck

On the 5th Jan 2018 I went to flight centre Canal Walk to book tickets to Johannesburg for my daughter and my 2 grandchildren. After waiting 45 minutes to see the consultant Jonathan Stiglingh as he was the only one on duty that Saturday morning we discussed the tickets. He asked about landing in Lanseria and after calling my daughter confirmed with him that Lanseria was not an option. I booked the 3 tickets and was told to come and collect in 30 minutes. I had now spent almost 2 hours in the shop. When I got back he asked me to check the names because we are Moslem he had not heard them before and wanted to check that they were spelt correctly. We did this. Now we have received an email confirm g that she flies out of Lanseria and both him and his Manager Karen say you signed so it's your fault. They couldnt even find the paperwork and could only call me back 5 hours later and showed me ticks on the contract which for all i know was added when they realised they were at fault.How after discussing the airport choices and saying Lanseria is no good he still booked them coming back via Lanseria and even though they are only returning mid March they will accept no responsibility and expect me to pay an additional amount of almost R3K. The one thing this has proven is not to deal with micky mouse companies like Flight Center and to deal with a proper travel agency. I will definitely take my business elsewhere