Utterly Annoyed with Flight Centre - The Reds

On the 29/05/2019 me and what was then my fiancé paid for 2 return tickets to Thailand. We were suppose to depart on the 11/06/2019. Tickets were paid in full as they said it was a special. I didn't question any of their arrangements or communications. So the inevitable happens and we break up two days prior to our departure. Not just a heartbreaking experience but now I have to cancel or change my booking in order to not suffer any more financial loss as well. I phone flight Centre - The Reds on Monday the 10/06/2019. I get told that IF I decided to cancel the tickets I could not do so and I need to give him time to see if he cannot pay or refund my money that was all taken from MY OWN BANK CARD. So long agonizing painful story short. He goes ahead and pays his own ticket which now leaves me R15 870.00 out of pocket. My very helpful Flight Centre attendant say they will cancel the tickets at a fee of 240USD which I can live with because then I would not loose as much in the end. Numerous phone calls and emails later and they have cancelled the tickets. Great news... Well that's what I thought. I expect to at least get back about R12 500-00. Today I decided to go into the Centre all the way from Alberton to Centurion. Well believe me when I say, the break up wasn't as painful as what I was told. They refunded me a total of R5511-86. What a shock. Not only could none of the ladies in the office tell me what I was penalized for but none of them even felt a little shy about what they had to tell me. So this is my calculation. Even if the 240USD app**** to BOTH tickets, I would still get back at least R8766. So where does the deficit come from. A total of R3254.14 that cannot be accounted for. And what is their so called explanation??? They do not know what it is for as it was Airline fees and taxes that was deducted. I simply cannot accept this and hope someone can help me. I refuse to loose R10 358.14 just because. They didn't give me a refund invoice with breakdowns. Only the printout slip form the FNB card machine. I need help and cannot just accept this because they say so. I expect them to phone me back and refund the R3254.14 because it s the right thing to do.