If JusTalk charged you twice, cancel the subscription immediately through Apple App Store or Google Play so more renewals cannot go through, because uninstalling the app alone will not stop billing.
JusTalk’s support pages specifically mention duplicate charges and refund requests, and they ask users to provide the order number, payment email, and subscription details for review.
Since your balance is now negative, contact your bank or card provider as soon as possible and explain that you were billed twice for the same subscription.
Many banks can reverse duplicate digital charges temporarily or block future renewals while the dispute is investigated, especially if the merchant does not respond quickly.
If the issue continues, raising it publicly on Xolvie can often trigger a faster response.
