As bednobs has said, we would need to see the policy wording but there are a number of different kinds of insurance. For example, a Personal Accident & Sickness Policy. These policies run for twelve months and the Insurers then invite you to renew (or not if they have paid out for a claim and they don't want you anymore). They usually provide income for a period of two years when you make a claim and then the payments cease.
A Permanent Health Policy on the other hand, once taken out and as long as you keep up the payments, can't be cancelled by the Insurers. It is not an annually renewable policy. If you need to make a claim they will pay you whatever monthly amount you have insured for and will continue paying that for the duration of your incapacity, right the way through to your normal retirement date. That's why it is called a "permanent health" policy.
You need to check your own policy wording to find out what kind of cover you have.