What to do when what arrived is not what was pictured
The box turns up and the thing inside is not the thing you clicked. Wrong material, wrong finish, wrong size, or a print where the listing showed an engraving. Here is the order it has to go in, because doing it out of order costs you the outcome.
Photograph it first, next to the listing
Before you message anybody, take a picture of the item and screenshot the listing page. Sellers edit listings and sellers delete them. The photo you took is the only version of the evidence nobody else controls.
Message the shop before opening a case
Etsy expects you to try. Say what you ordered, say what came, and say what you want, in three sentences. Most shops fix it here, and the ones that will not have started a paper trail you can hand to Etsy.
Ask for a refund or a replacement plainly. Do not ask whether they think it looks right, because that question invites an opinion and you do not need one.
Open a case if they stall
Etsy's case system opens once the shop has had a chance to reply. Not as described is the reason you want, not shipping. Attach the photograph and the listing screenshot. The wording that works is short: the listing says one thing, the item is another, here are both.
What about the review
Leave it, and leave it factual. Say what you ordered, what came, and attach the photograph. Skip the adjectives. A review that describes the object is useful to the next buyer and hard for anybody to argue with.
If the shop offers you money to change or remove it, that is worth knowing about. You can accept a refund and keep your review. Those are separate things, and a shop treating them as one has told you what its rating is built on.
Take the refund, keep the record
Getting your money back closes your problem and nobody else's. The photograph and the review are what reach the next person, and they are what this archive is made of.