I have been double charged on 2 different credit cards

If you have been double charged on two different credit cards, it may indicate an issue with your billing profile, potentially suggesting that you have two accounts or that there is a billing error. To resolve this, it is best to contact Microsoft Billing Support directly, as they can review your account details and assist you in correcting any issues with your charges.

You can reach out to them through the Microsoft 365 Admin Center or by visiting the Microsoft support page for billing issues.

References:

• I have been charged twice - Microsoft Q&A
• Have been billed multiple times on multiple charge cards for renewal - Microsoft Q&A