@Jaeyoon
Where you see the double billing? Were they on the credit card or were they on the Payment History on My Acocunt (https://myaccount.publicmobile.ca/en/account/payment/payment-history ) ?
If you see them on your credit card, check if one of the charges is just a pending charge while only one of them is the posted charge.
If they are on Payment history on My Account, please note that each renewal will show at least two transactions on payment history on My account. Only one entry shows actual PM charge, show how much PM charged your card and applied the amount to your Available Fund in My Account. The other entry, likely couple hours later on the same day, will be showing how PM uses the money from your Available fund in My Account for plan renewal.
Post us a screenshot of you have any question.
If you are certain there are more than one posted charge (and not pending) on your credit card and you cannot find where the extra money went, engage support for further investigation:
