I just dealt with this on my listing. So this is a big problem with Amazon right now. These are Chinese sellers that launch and then don't ship anything with a fake tracking # or they ship a shitty counterfeit. They leech onto your listings (or make a new one as shown) and try to sell under your brand. They're scum. You're having success, they want a part of it.
This ruins your brand as well as the product page gets bad reviews because a lot of people on Amazon do not know the difference between seller performance rating and Product rating.
The way to have this removed is to email seller performance and call them. They will ask for either trademark info or IP info. If you have your patents and trademark registered, you send that over and they will most likely remove it. I have heard of situations where Amazon does not remove it but in my case, they removed it after I contact a few times and wrote out a detailed email. I didn't even have a trademark, but I had all my sketches, the photo and product insert was my artwork so I said it was copyright infringement.
You can first try to send the hijackers a firm but courteous message like below first. I have heard some of them will remove it willfully. Mine did not and brazenly lowered the price and tried to take the buy box from me by pricing at $15 for a $25 product.
Hi Seller Name,
I noticed you are selling a X product as New. However, this product has never been resold to any wholesalers or resellers and we are direct to consumer through Amazon.
I own the brand, and have not authorized you or anyone else, to sell X on Amazon.
If you are selling a different brand, while posturing as X, then the product is counterfeit, which is something that Amazon takes very seriously and will shut down your account without warning.
If you do not remove your product from the X listing within 24 hours, I will have to contact Amazon and issue a formal Cease and Desist letter.
This isn't the ideal situation for either of us, so I hope that you take heed to this note and remove your product from X listing immediately.
Thank you for your prompt attention.
Your name.
In your case you have a lot of them. I assume it's been going on for some time. For your listing you need to continually check "Other sellers" to see if anyone that you have not authorized is selling.
Amazon doesn't seem to give a shit about these sellers even though they ship nothing, cash out and then get banned.
Another way to prove this is to place a test order and show Amazon it's counterfeit. But seeing the estimated shipping date, I doubt they will ship anything and send out a fake China post tracking like mine.
I heard of other techniques where you just order all their stock and they get scared and cancel the order and remove themselves, or it's a temporary measure to stop bleeding on your listing and then you A-to-Z Refund it all later.
Lastly, it is possible they are selling a real version of your product somehow. So you might need to check but it gets annoying having to wait a month and they ship nothing.