iTunes had undergone many revisions and with each update comes the elimination of the familiar. In Google searches on how to cancel subscription or auto renewal in iTunes, I would still come across tutorials for old versions of iTunes on the top results where iTunes still had an option for Delete Subscription.
I had subscribed to Office 365 via iTunes for some time in the past and when the time came when I no longer needed to use it on my mobile because I bought a new laptop which came with a 1-year free subscription of Office 365 Personal, I found cancelling my subscription auto renewal to be a more stubborn idea than I had thought – stubborn in the sense that I did not want the Office 365 to appear under my iTunes subscription. I could not cancel it on my Office 365 dashboard because the subscription was done on iTunes.
To prevent my iTunes account from automatically charging my card for my Office 365 Home subscription, I went to the App Store on my iPhone and tapped on my Account name and email. I selected Country/Region.
In my case, I changed it to the US store and it solved the auto renewal charge problem for me. I did not change stores for a month. The advantage of changing stores is to get rid of the auto-renewal charge. If you let it auto-renew, you can still cancel but even cancelling the subscription will extend the period you are still subscribed to Office 365 Home via iTunes. Changing stores eliminates this problem as the Office 365 subscription will no longer appear under your Subscription list.
You have to make sure you have no other existing iTunes subscriptions other than your Office 365. There is no clear cut workaround about completely deleting the Office 365 subscription on your iTunes account and not see it listed there anymore.
If you decide to change your store back again (because some local apps are exclusively available for download only in your country), the Office 365 subscription will still appear but it will now be listed under Expired.
The Expired list does come in handy for when you change your mind and want to renew your Office 365 on your iPhone. Simply follow these steps:
Another option would be to delete the e-mail account associated with the Office 365 subscription. Just make sure to back up any data in your OneDrive and/or Outlook e-mails.