Hello,
Thank you for being a long-time AxCrypt customer, and for explaining the issue in detail.
The verification step you’re encountering is related to your credit card and bank’s security process (such as 3D Secure), not your AxCrypt account. The one-time code is sent directly by your bank or card provider, which is why we don’t see or store a mobile number for this verification on our side. Your bank will be the best point of contact to help ensure these verification messages are delivered correctly.
That said, to make the upgrade easier, we also support alternative payment options. You’re welcome to try upgrading again using PayPal, or by reattempting the payment via Stripe with a different card if available.
We truly value your continued trust in AxCrypt and hope one of these options allows you to upgrade smoothly.
Please don’t hesitate to try again, and feel free to reach out if you need any guidance from our side.