If you enter 360 ars as your expeniture on the Visa site, you'll see you'll be charged approx 1 USD. If you enter 1USD and ask how many ars you get, the answer is approx 199. So, Visa and presumablely MC are exchanging Ars to USD at a rate of 350 ars to 1 USD, and exchanging USD to ars at the rate of 190, the official rate. So, once again , it's pay in ars via Visa and get basically the whole Blue rate.Even after a few days? It didn’t refund you the difference to give you MEP?