Any suggestions on how to resolve this?
Sell fbm.
There is a difference between Hazmat and Dangerous goods. You can be signed up for dangerous goods which requires you to send the items into FBA using your own courier as opposed to Hazmat which means they don’t want it in their warehouse at all, which means you have to FBM it yourself unless of course they flag it with a chemical issue & require a document at which point nobody can sell it.