Keypad not connecting

Hello all ive had my ring alarm for nearly 6 months now and its been working well. However my ring keypad suddenly stopped working or responding to commands. I have factory resetted the device using instructions provided by the ring troubleshooting guide. When i attempt to add as a new device it just says plug device in. Device is plugged in and i am have held down the 1 button on the keypad but nothing works. I have repeated this process several time and even tried a manual addition and it does not work. RIng can you please advise!