Problems with HSM02

I had paired this device a while back and it appeared to work but of late I’ve not been getting any events from this device, the batter was at 90% the last time it had reported. I tied to reset the device (3 quick presses on the tamper switch and then one long press) but the device led is not responding how it is supposed to from reading the manual. Does anybody have any experience with this Door sensor?
I’ve deleted it from the hub and I can’t seem to add or do anything with this device. The LED does blink when the door is opened or closed so I’m thinking it is probably still sending notifications to the Hub. Now with the device deleted from the hub I’m not sure what to do next. Any ideas?