No, you've held your percentage the same. Your revenue is not the same. It's growing exponentially because of inflation and because the cost of the basket size that gets charged goes up. It's a false claim to say that you're not making more money.
Why is it that when you're making that much more money...? Are you that much less efficient than your competitors like Moneris and others, which have agreed to this price change? You're refusing to do it. Are you that poor a company in your technology that you can't take this modest price cut?