I thought my Nationwide policy was still active until I logged in

I had Nationwide for my dog since 2014 and always used automatic payments. Recently I realized no payment had come out. When I checked the account, my policy showed as expired. I called and was told the older plan had been discontinued and a letter had been sent. I never saw it. My dog is older now, and they said they could not insure him under a new plan because of his age. I wish there had been another notice before coverage ended. Has this happened to anyone else?