The travel insurance cover commences on the date specified in the Policy Schedule or the time you board the conveyance to leave for onward overseas journey or the Departure Date as per the policy, whichever is later.
If you are starting your journey after 15 days from the travel start date mentioned on your policy then your policy becomes invalid, so get your policy revalidated and travel start date on it changed. if your travel start date has not begun ,you can simply put request for change of travel date and if travel start date has begun then you need to send us the passport copy as proof that you have not travelled and date needs to be changed.