This is the response we received from our case. Does this mean we are not able to send inventory to amazon anymore?

Please note that some of the FC(s) are block listed because the fulfillment center does not accept items from the merchant as this fulfillment center has been shut off.

Please note that some fulfillment centers are GSS fulfillment centers. As you have not chosen the GSS inbound program (GSS / GSS_DA) for this shipment, its blocking the listing to get shipped. GXD fulfillment centers only allow inbound for GSS and so they are filtered out.

Please know that although we at Amazon believe in providing our best support to our sellers and love to meet all their expectations wholeheartedly, at times we do come across such situations where we are unable to process your requests because of the process and policies.

We are well aware that informing you this will cause you a sense of dissatisfaction with the support team.

Please accept our sincere apology for the inconvenience as our guidelines are aimed at protecting sellers experience and I am sure you can also understand the intention.

Please note that this case was carefully reviewed and there's no further information left to be provided from our end.

Re-opening this case multiple times will not change the result, and the same response will be applicable for future reopens on this subject (or) query. Therefore, as their is no path forward we are closing this case, please raise a new case if any issue persists.