I feel this is def solvable these days -- but the 7 years thing is gonna be tough to overcome at this point.

What I've done on some of these "need to escalate to a human" issues is to buy a ticket to Amazon Accelerate (in Seattle every September), book a Seller Cafe appointment to talk to a leadership team person (I think recently got moved to the captive escalations department), and get someone to talk to face to face.

I know it sounds dumb but I've solved issues that were costing my company 7fig/year sales like this.