How Do I Escalate My Netgear Router R7000 Case 46391511

I've spoken to the same Support Agent several times over the past few weeks with the hope of remedying the issue of "slow router speed" i.e., the router appears to be converting 900mbps received through the modem to below 300mbps.  Before contacting Netgear my provider sent a technician to my residence to troubleshoot my internet connection. It was established at that time that the modem wasn't at fault. Netgear initially agreed and sent a replacement router. Unfortunately, the replacement did not resolve the issue. 

I reconnected with Netgear and advised Support of the situation and requested help. Based on the Support script, which appears all the agents must follow ad nauseum rather than establishing the systems experience level of their customers,  system tests involving the switching out of equipment connections were performed as well as associated speed tests. The issue was escalated within Netgear and each time I was requested to perform the same tests again and again i.e., data was captured and reported by me but the agents did not document the results to pass them along.

By the time I reached the current Support Agent I was extremely frustrated and that frustration was aggravated even more by his condescending attitude.  I do not mince words so I informed him of my dissatisfaction with his approach several times. Our first call lasted over 6 hours.  During which time tempers flared. The agent advised he would send all the data collected to the Engineering Team.   He has followed up with requests for additional information and that information was provided. 

Today the Support Agent contacted me by phone asking me to provide the model #s for the attached devices stating it was at the request of Engineering. I immediately said no and was asked to keep quiet until he could explain the reasoning behind the request.  He explained they could only determine the needs of each of the attached devices i.e., bandwidth by having the model #s.  Then I was told, I could speak.  At which time, I advised him the request was unreasonable and a waste of my time. (Note: currently there are 15 devices attached to my router). I also advised I would no longer use Netgear products or renew my Support Services Contract because of his attitude and the lack of resolution to the situation, which saddens me since I've had several Netgear routers over the years ,which worked beautifully, and the support was very satisfactory.

I then proceeded to conduct additional research to confirm my understanding of what is needed to perform such analyses and found  I was correct and only IP and Mac addresses of the attached devices are needed. I gathered this information from several sources including Netgear itself.

I proceeded to compose a response to the Support Agent to memorialize our conversation and my subsequent findings, plus suggest it might be beneficial if Engineering would use its time to update the Admin Dashboard to include the Received and Sent Packet data for the benefit of all Netgear customers, but when I clicked Submit, the screen just kept cycling and the message was lost.  Again yet another frustration piled on top of frustration after frustration. 

So what I need to do now is escalate this case to the proper level. However, I've not been able to find any information as to how to do that. Can anyone help?