Product: Credit card or prepaid card

Below is a copy of the official letter I mailed J Morgan Chase. it has all relevant information about the issue. I will also attach some documentation. Please contact me for any question or if anything is unclear.

-- -- -- - I have contacted all possible departments in chase and visa as far as I could reach and have not receive a practical, relevant official response from any of them, including chase escalation team case manager. I would like to receive Chase banks official response to the acts of consumer fraud systematically occurs to their clients including me as described below. Such fraud happens every day to international travelers by Chase and Visa and results in most likely amounts beyond imagination. 
To briefly describe the events. I am a frequent traveler. I recently traveled to XXXX. During my travels I usually use two main cards, my Chase XXXX XXXX Visa card and my XXXXXXXX XXXX  XXXX XXXX Mastercard. By coincidence I noticed that unwillingly and unknowingly, when I use my Chase XXXX visa card, the Visa processing agencies ( the POS party represents Visa abroad ) coverts local currency at the time of sale to dollars. The visa terminal knows I am using an international card and the decision to convert to USD is  mandatory when using XXXX XXXX Visa Card with no notice to the consumer. You only find out about it when you get the receipt if you bother to read the details. 
This act of fraud charges every customer an exchange fee ( in XXXX Comision ) of 3.5 % of the total in addition to a bad exchange rate, reaching almost to 4 % difference in the price between the total amount charged in pesos to the actual amount charged into the card in dollars. All this process is out of the consumer control. 
In comparison, on same merchants / country / Visa processing agencies ( POS   machines ) when I use my XXXX XXXX Mastercard, the merchant ( salesperson ) is being asked to select a currency by that giving the customer the option to choose if to convert and charge a fee or let your banking institution in your original country do it for you. As I always select pesos I was therefore never charged this outrageous fraudulent fee when I used my MasterCard ( also a no foreign transaction fee type of card ). 



I personally went through the charging process on some vendors mobile POS   system ( the mobile terminal ) and witnessed the different questions asked in my XXXX MasterCard compared to my Chase XXXX XXXX. 
Chase Bank alongside with Visa are part of this scam and advertising for no foreign transaction fee, when in reality it is many times charged at the time of transaction. The bank statement shows a dollar amount as if it was charged in dollars. A fee shouldnt have been applied even if the card had a foreign transaction fee, as there is no conversion to be made. 
If one wasnt to look carefully on his receipt, and if they wouldnt have a method of comparison ( e.g. MasterCard ), they most likely wouldnt know about this fraud. I recall that happening to me before in my previous trips to XXXX, but this time we are going to follow through this fraud and get those abused customers their money back. 
I will attach some sample receipts to this letter. 
Looking forward your prompt written response. 
Thank You, XXXX XXXX XXXX XXXX XXXX XXXX XXXX, XXXX FL XXXX XXXX XXXX