Ring app won't open on phone and my doorbell doesn't detect activity

I have a ring doorbell and just recently my app won't open on my phone and I don't get notified when someone comes to my door. It worked perfectly until 2 weeks ago. I've had the doorbell for 15 months. I also called ring customer service and after trying a few things and 1 hour later. Nothing worked. I reaching out to my community. Thanks for your help.