Miscellaneous topics that do not fit into specific categories.
Hi,
May I ask if you have checked the details on your Order History on your account? You cannot be billed for the same subscription plan. The other subscription might be from another Microsoft account.
If you cannot see the other subscription in your order history, but reflected on your bank. The subscription belongs to another Microsoft Account. Please check your other account or your family accounts and see their order history.
If you are still unable to determine the account from which the subscription is, please use the billing investigation tool to determine which MS account it belongs to. Please refer to the article below.
How to investigate a billing charge from Microsoft
If you need additional assistance, please let me know.
Stay Safe!