A refund: To qualify for a refund, you must not have started your trip or made any claims, and your trip costs must have been refunded in their entirety by your travel suppliers without any cancellation penalties or travel credits. Read 'How do I cancel my Travel Protection Plan?' 'Do I qualify for a refund?' and 'What’s the fastest way to get a refund?' for more details.
An amendment: If your trip dates have not passed and your rescheduled trip is to the same destination and the same number of days as your original trip, and within 365 days of the purchase date, then you can change the dates of your Plan to cover you on the new trip. To do so, just log into your membership. If you don’t have a membership, you can create one here. Travel Protection Plans can only be amended prior to the departure date shown on your Plan documents.
If you’ve already started your trip but had to end it early, unfortunately, you won’t be able to get a refund for the remaining days of your Plan. You also won’t be able to put your Plan on hold to reactivate at a later date.