Constant Removal & Disposal Fees for items we haven't shipped to FBA in 7 years

Almost every day for the last 3+ years, we get notified of unfulfillable FBA inventory that needs removal or disposal... Except that we haven't sent this items to FBA since 2018.

These are from another reseller using FBA for the same items. These goods have a high damage rate.

But for some reason, when the become unfulfillable, Amazon is charging the wrong reseller, us, for these goods.

Either we pay for disposal or pay storage fees for items that clearly were not ours to begin with.

We file cases and Amazon takes month to give us a refund but never solves the problem of how this keeps happening.

Almost every day, from 1 to 500 items get added to our account as unfulfillable making us responsible for their removal instead of the reseller who sent them to FBA.

We are unable to get anyone at Seller Support to properly investigate the source of this system error or block it from showing up in our account.

Any ideas???

Thanks,

Adam