He's so cute that even a bad hair cut doesn't take away any of his cuteness.
I can see that maybe the groomer was new and practicing.
I would not have paid her at all if it were me.
I agree about learning to do these cuts yourself. It isn't difficult at all and there are plenty of video's to show you how. The initial cost for good scissors and clippers isn't cheap, but do invest in the best ones as they will last a lifetime. Doing the grooming yourself will save you a fortune!