Shopify — Received wrong order

I ordered a set of 6 bras and undies on perfectfeel222. Not only are the pictures on the website completely misleading and the products extremely bad in quality, I got a completely different order of 3 bras and no undies.

I would like to return this order and I want a refund. I have emailed the merchant 3 times and they have not replied yet.
Shopify hasn't gotten back to me either so my next step would be to file a police complaint if i don't get a reply about the return of these items.

This is no way to do a business. There is absolute lack of quality in both product and service.