You've reached other Buyers and Sellers here, like you. And you can't name and shame on these Boards so the moderator may edit your post.
That said, it's good background work you did by adding the Seller to your Blocked List. You can also use the Report a Seller feature. And leave brief Negative feedback, something like Unsatisfactory transaction (unless you are au fait with eBay Feedback Policy). Don't mention item not received, as 'tracking' shows it was.
Then open an Item Not as Described Case (do not use INR because tracking shows it was). Or you could use Missing Parts or Pieces if you prefer. If the case is not settled in your favour come back for more help. Do not close the case without a refund, and remember to escalate it to eBay on the 4th day. Keep the reason brief and factual as if you were speaking to eBay directly (they may read it later).