I'm paying for a MIA Sphere Live service that I haven't subscribed to, would you be able to provide information on what is this service for and why I'm paying for it? Which personal information do you share with this service provider?
Please would you be able to to cancel subscription to this service and refund me the amount paid?
This is generally not the place for customer service. Its a public forum.
Do a search here on MIA SPHERE to find out what you need to do.
Then contact Optus directly (Phone or LIVECHAT)