You can contact Allianz to cancel it, as long as it's within 21 days of making the booking. Ticketmaster is unable to cancel the policy for you and can't refund the amount to you, as the funds are already with Allianz. You can contact Allianz on 0345 641 9726, by email at missedeventinsurance@allianz-assistance.co.uk, or by writing to the address below:
Customer Services Manager
Allianz Assistance
102 George Street
Croydon
CR9 1AJ
For theatre shows, you’ll need to contact Ticketplan. You can make a claim on the Ticketplan website.