Be careful when paying with a US credit card (or any card not based in Portugal). It is very tricky. When they run your card, it asks if you want to pay in Euro or USD. Always say EURO because this is a scam to charge you a horrible conversion rate. You will get a better rate when your credit card converts the charge. Also, they try to get you again at AIMA because the next question is “Accept conversion?” - this is just another way of asking you the same thing. ALWAYS SAY NO! I made the mistake of listening to my attorney who thought it meant something else and I paid a $400 fee because I said yes. 
I only ended up having to use my credit card because my WISE card would not work. Wise has a limit on how much you can charge per transaction or per day. This fee was beyond the Wise limit, so my payment got rejected.