How to offload inventory while minimizing losses

I bought $6K worth of products that were selling really well on Amazon from a brand with many sellers.

I bought $5K worth of products from a supplier that is not well known but is still legit. ($3K was the minimum order and with a 1 month lead time; thats why it was a large $)

$1K worth of products from a known supplier at the same time. This was because although my margins would be very low, since this supplier is well known Amazon might accept their invoice in the case of supplier 1 being rejected.

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Well lo and behold both invoices have been rejected, and I have not been able to get ungated on this brand.

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What should I do to offload the inventory while losing the least amount of money?

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I guess the options are to sell on my own website, sell on other 3rd party websites, or sell locally.