@JeroenE#116113 This is the kind of response that I was complaining about. "Just report it to the authorities" really isn't that simple.
In the page you linked there are three authorities listed in France, which is where the company most recently discriminating is based. Which do I contact?
The links included are to general pages, not forms or specific enforcement contacts. Where do I go from there?
I don't speak enough french. How do I speak to the correct person once I've found them? What about other companies in other countries? I've also had the IBAN discrimination problem in the Netherlands. Do I have to learn dutch as well?
What happens when the authority says "You are not a French citizen - we are not here for you", which has happened to me in that country?
Sure, I could find someone who is French, or at least speaks French, to write a letter, wait for a response from the authority, contact the company, etc, maybe engage a lawyer, and fight for weeks or months. But I really just want the payment to go through so bills are paid by the end of the month, so I have to use a different bank.
It's really just not as simple as you naively assume.