Hello, good day and thanks for your question. Sorry to know about this and if there is no other subscription that is present on your account this means that the payment method or the card that you are using got caught somewhere from the last time that you have used it and this has caused an unauthorized charge and in this case it is best to reach out to the bank to block and replace your card to avoid additional or future unwanted charge/s.
It is also a good measure to temporarily lock it from the bank's website or the bank's mobile app to ensure that you will not have an unauthorized charge while this is still being figured out.
Meanwhile, please reach out to the Minecraft team at https://aka.ms/Minecraft-Support/ for this to checked, investigated and corrected accordingly.