Unable to access ring/blocked IP address

Hi, I recently purchased the Ring Video Doorbell gen 2 and have had numerous problems with the device. I now cannot access the ring app, my ring account or the ring website when using my home WiFi. The only way I can access the ring products is by using mobile data or if I use my WiFi via a VPN. My doorbell is no longer communicating with my WiFi. It appears ring is somehow blocking my IP address so the only way I can access the ring app or website is by using a VPN. However if I use a VPN the camera on the doorbell will not work. I see on the ring community that this appears to be a common problem but I cannot see a fix. I have reset my router, even tried a new router, removed and reinstalled the app and reset all my devices but nothing works. I can only assume my IP address is blocked. Thankyou for any help or advice.