Xfinity forced free XPod to stop working

First to begin with I am Diamond member (long time customer with no real benefits when it comes to getting support).  A few years ago I received an Xpod (XE2-SG) since I was getting slow service in my house with my kids rooms.  About a month ago it stopped working and had a red light, I am completely convinced this was by design to force customers towards the newer modem/rounter/wifi extender bundle.  I also had an IAqualink 2.0 unit configured fine on 2.4Ghz using WPA at the time with the older modem/router.  During my troubleshooting with the Xpod after 2 visits to Xfinity stores (2 different cities) they referred me online for support.  During this interaction with offshore support (language and cultural barriers) they recommended I switch out my equipment rather than replace the Xpod.  This is where the newest and latest equipment model/router/wifi extender comes in that is the future replacement for the Xpod generation of extenders (corporate move through support dealings).  After installing the new equipment my IAqualink went offline since it could not communicate with the new band steering (blending 2.4 and 5.0Ghz banding them together).  After 4-5 support and escalated calls (4 of which were lost calls and not call backs) trying to unband the 2.4 and the 5.0 channels it did not work and had to dispatch an Xfinity field engineer the next morning.   He was experienced and arrived on time and tried to hook up his equipment to my Xfinity WiFi and failed right away.  He then had to reset the new equipment and was successful in breaking the band steering to separate the 2.4 and 5.0 but still not able to connect IAqualink 2.0 device.  After a few attempts he swapped out his modem/router with a different one and same results, not working.  I then asked him to return me to my old modem/router and he just happened to have those in his inventory.  Low and behold everything began to work instantly back on 2.4Ghz using WPA2 so we left it place but now we are back to square one needing to extend my WiFi for my daughters.   Needless to say I had to purchase a new Xpod for $119 which arrives tomorrow (went this route since Amazon WiFi extenders will not perform well as they will choke them down).  In the end after multiple calls (dropped and no return call) and hours of troubleshooting, change out of equipment (loss work), discovery of how support can easily turn on features (but can't find options) for GUI access to modem/router and the Mobile App.  If I were to rant it would not be pretty so my simple ask is whom to do I talk with in Xfinity to plead my case to credit my account for the cost of the new Xpod for my time, frustration, and subpar support I received?