Was hit by DCC in a Shanghai restaurant (everything elsewhere charged me CNY/RMB) with a 7% surcharge.

I received the SGD pre-approved for SGD and rejected it, asking for CNY.

They first told me that they needed the manager's code to unlock the terminal option.

OK I was willing to wait for the manager for 10 minutes.

Manager came and played for a while with the terminal, telling me that they used to be able to do that but that the bank had changed the firmware and that now the option was not available anymore, they would have to call the bank for instructions.

OK, I waited another 25 minutes, with my local Chinese friend doing the translations both ways.

Then they told me the firmware was the most recent and that the bank couldn't change it.

I had waited for too long, I signed (even though it says "I was offered a choice of payment currencies and my choice is final") and told them I would fill a claim with Mastercard.

How does one go to fill a claim with MC ?

Julien