New Plan???

I had an original Ring Doorbell, battery operated which went kaput with about 4 months left on my plan. I purchased a new Ring doorbell to replace it, set it up and found out I could NOT add it to my original plan, which I had to cancel and then I was required to create a new plan. By rights, I should be receiving a refund of about $20+.If not, I will say ..... what a crappy way to treat your customers!!!Fool me once, shame on me .... you won't get an opportunity to fool me a second time!