How long does it take to get back to the seller if your return a package?

2 weeks ago I went to my local package and sent back an iphone I had bought (valued at 292 dollars). I had bought it through a highly rated seller on amazon. As of now I have been in contact with the seller, who says the package has still not been returned through usps. I also do not have a tracking number. I live in Virginia and the place I'm sending it to is only in Kentucky. Is this normal that it is taking this long? If not what do I do? This is an almost 300 dollar refund I should be receiving so I'm very worried about it.

Assuming you sent it ground, a few days.

Kentucky isn't but a few hundred miles away.