If you can't attend an event, the non-attendance insurance Mondial Assistance will refund you 100% of the amount paid for the ticket.
The non-attendance insurance will cover you provided that you can't attend the event due to illness, trip delay, traffic breakdown or accident, job layoff, etc. Check here for the terms and conditions of the non-attendance insurance.
This insurance covers the total amount paid for the tickets up to a limit. You can check here for the limit of the compensation.