Thank you for sharing the error details. The message "Couldn't complete purchase. Contact support@vapi.ai for assistance." indicates that this issue may require direct support intervention ([Vapi Support](
https://docs.vapi.ai/support)).
To help us assist you further:
Have you recently migrated your account to the new credit-based billing system, or are you still on the old billing system?
This information will help determine if the issue is related to billing migration, which sometimes requires manual steps.
Sources:
- [Vapi Support](
https://docs.vapi.ai/support)
- [Changelog Oct 10, 2024](
https://docs.vapi.ai/changelog/2024/10/10)