An Azure service that provides quantum computing and optimization solutions.
Basically you can not upgrade an account without having a payment method. Refer:
https://learn.microsoft.com/en-us/azure/cost-management-billing/manage/upgrade-azure-subscription
To control your costs, you may use the following tools provided to you by Azure.
- use Pricing Calculator to estimate the cost for the service, before you start using it.
- Use alerts feature to notify you based on a predefined condition.
- Use Cost Analysis and Budgets to better manage the costs.
Hope this helps