how cancel power bi pro subscription?

Hi,

Thank you for reaching out.

A Power BI Pro license can be purchased directly by an individual through self-service purchasing, provided that this option is enabled by the organization. Therefore, the cancellation process depends on how the license was originally purchased.

If you purchased the Power BI Pro license yourself, sign in to account.microsoft.com/services/microsoft365 using the same account that you used for the purchase and select Cancel subscription. You do not need to be a Microsoft 365 administrator to manage a subscription that you purchased through self-service.

If the Power BI Pro license was purchased and assigned to you by your organization, only an administrator can manage the subscription in the Microsoft 365 admin center. In that case, please contact your IT administrator and ask them to remove the Power BI Pro license from your account.

Since you are receiving a message stating that you do not have administrator privileges, first verify whether you purchased the license yourself or whether it was assigned by your organization. This will determine whether you need to manage the self-service purchase yourself or contact your IT administrator.

In case you do not know who is your IT admin, kindly refer to this article: How do I find my Microsoft 365 admin? - Microsoft Support  

I hope the information I shared earlier was somewhat helpful in addressing your issue. If you have any further questions, please don’t hesitate to share. I’m always happy to assist further if needed.   

Wishing you a great day ahead.