How can I follow up on an assigned Bing Webmaster Tools ticket with no reply?

I manage MixLivo (https://mixlivo.com/). My Bing Webmaster Tools support request shows as assigned, but I haven’t received a follow-up.

Bing Support asked me to submit a new request through the official form. All of my recent submissions received REQ numbers, and my attempt to follow up by email was rejected. I haven’t found a way to add evidence to the assigned request.

My original UCM case concerned the visibility of MixLivo’s guides in Bing Search. For example, URL Inspection showed that https://mixlivo.com/guides/chatgpt-plus-price was indexed successfully and displayed the revised HTML, but I still couldn’t find that page in Bing Search.

Since the original review, I’ve substantially revised the guides and consolidated overlapping pages. I’d like to request a fresh manual review and can provide a dated change log and screenshots.

Has anyone successfully followed up on an assigned REQ case in this situation? How can I get it linked to the original UCM case and send the supporting materials privately?