Mobile hotspot limit maxed and can’t remove

So my hotspot will show up for new devices, but it doesn’t ever actually connect, just spins and says no internet. Hotspot works perfectly fine for devices registered to it previously though. How can I remove all these old devices from the hotspot ( I no longer have access to them ) on my phone? I’ve tried every update, called my provider and Apple yet nothing. I just need to know how to remove these previous hotspot devices.

Please and thanks

Alex