Our condolences, ewan1234.
Let us arrange our Accounts Specialists Team to contact you to locate the service and discuss details of service termination. To proceed, send us a PM with the account details (Username/Customer ID together with the address on file).
How to send a PM? https://community.tpg.com.au/t5/Welcome/How-do-I-private-message-PM-in-the-community/m-p/4093.
I am supporting someone whose phone is in their deceased mother's name and they need to cancel the account, how do I go about this?