What is going on with Amazon?

I bought 36 units of an eye care product. Sent it off to Amazon and they sold in less than a week. Quick and easy.

So I make a deal with my supplier. Bought 320 units, around 8000 dollars. Send it off to Amazon…

But i can’t make a single sale now. The item sells 500 plus units a month. I lowered my price and have the buy box. But even after a week I can’t get a sale.

I am not sure what to do. But recently i had had some items that not selling well after i restock them .. but never this bad