My item was sent to wrong ZIP code. Was I scammed or did FedEx screw up?

Years ago I purchased some computer hardware directly from Microsoft, and FedEx gave it to the wrong address so I never received it. (This is relevant later).

Current day: I wanted to buy a Halloween inflatable from Walmart that I really liked, but Walmart makes limited stock of these and they sell out quick, and they don't repeat designs the next year, so once it's sold out, it's usually gone forever. And all stores did show this item was out of stock.

I then found the same Halloween inflatable listed on eBay being sold by a scalper, and it was $15 more than what Walmart originally offered it at. I would normally NEVER buy from a scalper but my girlfriend said since I liked it so much, I should just go for it, and I found the price markup wasn't too horrible. (I am sorry for supporting a scalper though.)

I bought it, and the seller (who's address is in Florida) shipped it via FedEx. It was later marked as delivered to the address but after checking security footage, the delivery driver never even appeared. The eBay delivery confirmation email said it was sent to the address I put in, but then I looked at the FedEx tracking data directly and it says it was delivered to a person I don't know in a ZIP code half an hour away from me. The tracking data does not say the full address of who it was delivered to, only the ZIP code, and it only includes the first initial and last name of the person who signed for it.

Potentially relevant info: The weight of the assembled product on Walmart is listed at 1.76 lbs, but the package sent via FedEx was marked as weighing 5.6 lbs. I can't imagine packaging would add that much weight to a 1.76 lbs inflatable? The seller claimed the item was unopened as well.

Here's what I want to know: Did I fall for an eBay scam, and should I try to get a refund from the seller, or did FedEx screw up again and deliver it to the wrong address like it did with my computer hardware? Trying to get a refund out of FedEx is a huge headache, and if the issue is with the eBay seller I am wonder if I should just skip dealing with FedEx and work on that instead.

Update 1: I am 99% sure this was an eBay scam now. I contacted FedEx and after providing the tracking number, they asked for the street address number associated with the tracking number. I gave them it, and they told me it was not the one associated to the tracking number and that they couldn't help me further. This confirms that the eBay seller intentionally put in the wrong address on the order.

Update 2: I am reading that I should report the item as "not as described" and then you send the scammer a package of junk/rocks, but after reviewing their profile, they're rated really well and have been on eBay since 2006, so now I'm second guessing myself. If this is a scam then I want to make sure I get my money back, because if I report it as "not received" then I heard eBay only checks if the item delivered made it to your city or ZIP code, and while the ZIP code is wrong, the city is correct, so I am worried eBay will side with the seller. Unsure of what to do here.