Basilisk Ultimate Dongle Stopped Working

Yesterday when I logged into my PC, my mouse (Razer Basilisk Ultimate) wouldn't respond wirelessly (battery is fully charged). I tried to troubleshoot and realized it might be a dongle issue. The mouse is never detected by the dongle - The mouse works fine in wired mode with the provided USB cable and is recognized by synapse 3 - If I connect the dongle directly to the computer it is recognized but the mouse isn't and won't move or respond to clicks and scrolls - If I connect the dongle to the charging dock and connect that to the PC with the USB cable, the dock is recognized by synapse 3 but the mouse is not (the dongle is properly inserted into the charging doc) - I tried restarting the PC - I tried re-installing synapse - I tried the mouse+dongle on a different PC and a mac, neither of which seem to recognize the mouse with the dongle - I tried going to device manager and updating the drivers, then deleting them to be reinstalled which still didn't work - I tried the update firmware software (from this link: https://mysupport.razer.com/app/answers/detail/a_id/3721) but in the first step with the dongle plugged in, it says update is required but when I try to update it, the update stops at 40% and keeps going back to the update screen (attached media as pictures since I'm unable to upload the screen recording) - I tried re-pairing the dongle and mouse (from this link: https://mysupport.razer.com/app/answers/detail/a_id/4868/~/how-to-use-the-razer-mouse-pairing-utility) but that keeps giving pairing failed would you like to retry (attached media) I am out of options at this point. Any help would be greatly appreciated. I got the mouse in May last year purely for the wireless functionality so not being able to use it wirelessly with the dongle is a significant issue.