I have never seen a vanity light over a kitchen sink. I'm curious why your electrician would wire it that way. If budget allows, I think you would be "better off" having him wire it from the ceiling if that is what you want, rather than ending up with something that looks out of place and that you may end up hating. If it absolutely has to be wired in the wall, is there room for wall sconces? They look pretty but I'm not sure how great they'd be for task lighting.
{{!gwi}}

Depending on where your sink is in relation to your peninsula, you might also consider lighting that is flush to the ceiling or a recessed can so as to avoid too many fixtures hanging down.

If he knew you had a pendant and he wired for a wall light, he should not charge you to correct it. Even if he didn't know and he changed what was there from a ceiling to a wall light without consulting you, I think he should fix it.

I also doubt it would be very expensive to change it if you need to pay for it for some reason. He is just being cranky, I think.

Sue