Fair! But the question and point is...WHY WAS THIS NOT CLEARLY STATED BEFOREHAND?! it's not a given like beef is to burgers.
But the question is, how do we know you're telling the truth if you can't even remember the name of the mixer? Maybe you also forgot their terms or didn't even read them before using the service? Try to remember which mixer it was.
Have a look at my comment above to Cantsay. It was $7.
That's not important. It could have been $70, or even $700; that's irrelevant.
What matters is the minimum amount specified in their terms