bad service and no response

I got a call from avbob 2 weeks ago telling me that I owe 2 premiums from 8 months ago, I asked the lady why they only calling me now and why did they not deduct double like they always do when I miss one month and her response didn't make sense. I send an email requesting for proof that I owe them and clarity and not response. I then decided to cancel last week and still no response. I'm very disappointed with avbob because when they recruit you their service is exceptional and when you need clarity they disappear. I will never recommend anyone to use avbob.