I built a TestFlight version of my unpublished app. While using it, I wanted to test out the subscription purchase and when I did, I used my real production Apple ID and not a Sandbox test account to purchase the subscription. I was surprised to see that it worked and I was able to use the test subscription in the app. However, I now have no way of canceling it. It has renewed every day at the same time due to the accelerated TestFlight subscription rate (it's a monthly sub). I read that it should stop auto-renewing after the 6th time, but I believe it's been over a week now and it still hasn't cancelled.
I understand that it's not a real purchase, but I would still like to cancel it so I can try it without the purchase again using this account and also use it with a different Sandbox account.
Can someone help me with canceling it? Since the account I used was not a Sandbox account, I can't just clear the purchase history in App Store Connect. Also, I can't go into my personal account settings to remove the subscription since it's not a production one.