Why can't we rate services who cancel?

Why can't we rate services who cancel?

Guaranteed! 24 hour delivery! Super fast! 100% success rate! No risk!

:::3 days later:::

Turns out I can't do this, feel free to cancel.

And since the order didn't complete, I can't rate them. That doesn't seem right to me. I've had this happen twice in a row now; and I suspect I wouldn't be going through this if users were allowed to rate these people down, or if there was some sort of indication of how many times these "experts" couldn't deliver what they promise. If I saw a service that regularly cancelled on people, I certainly wouldn't use them.