What is going on in RYY2 ??????????

I have repeatedly sent shipments to RYY2 FBA warehouse, and a concerning number of items have gone missing. Despite opening multiple cases, I have received no response or resolution from Amazon Seller Support. The losses are significantly impacting my business.

Details of Lost Shipments:

1.Shipment ID: FBA18TT8G6GB

Tracking: 1ZF725W50402562235

Issue: Entire shipment lost

Case ID: 17426359291 (No response)

2.Shipment ID: FBA18VFNC0DB

Tracking: 1ZF725W50408991010

Issue: 450 pieces lost

Case ID: 17607601851 (No response)

3.Shipment ID: FBA18W522HM2

Tracking: 1ZF725W50404450503

Issue: 911 pieces lost

Status: No window to open a case yet

Impact & Urgent Need for Resolution:

-Significant financial loss due to missing inventory

-Forced to repurchase stock, resulting in additional costs

-No accountability from Amazon, despite multiple case submissions

Has anyone else experienced lost shipments at RYY2 FBA warehouse? How can we escalate this issue to get a response from Amazon? Any advice on higher-tier support or alternative solutions?