Canceled premium

I had a policy with Hollard for warranty for more than 3 years now and they just canceled my premium because 1 premium was not paid. I would understand it it was more than 2 months but for 1 months only and it get canceled? I have been with them for long to treat me as their client the way they did, and not even one consultant tried to call me and for arrangements. Most of the companies if you fail to make a payment they do call their clients or double debit the following month, so what is so difficult for Hollard to do the same? And they have the nerve to call be back and offer me a new policy were the premium is double of my normal premium. Hollard must wake up and do as other companies before it is too late. They don’t respect their clients.