CANCELLED BOOKING FLIGHT WITH CURRENCY DIFFERENCE

On 3 Feb 2015, I have booked two return ticket from Jakarta to London. <br> For unspecific reason, they cancelled my ticket while I have paid full using my credit card. They just sent me an email which moved to my junk email folder. <br> In very last minutes I just realized it and I have to book with another travel online (nusatrip). Thank's God I found this Nusatrip.<br> On 5 Feb 2015, tripsta refund back my transaction, but due to currency difference, I have to pay IDR 1,757,999 to my credit card... <br> I really upset and sent an email to tripsta, but they seems do not want to hear my complaint and just replying my email informing that they have refund 100% back....and never try to understand that I have to pay about USD 200 for this **** service. <br> <br> Below is the summary from credit card billing statement <br> <br> 03/02/2015<br> TRIPSTA Athens<br> 21,235,805.00 Dr<br> Posted<br> 05/02/2015<br> TRIPSTA Athens<br> 19,477,806.00 Cr<br> Posted