Hi,
Please note that here in the Microsoft Q&A forum, we are fellow users and do not have account access.
Is this a personal subscription or Microsoft 365 Business?
If personal, please log in to your Microsoft account and go to Services & Subscriptions. Do you see the double charges there, and do they have the same description and amount?
If it’s a monthly payment, can you also check if a payment was made last month?
If there wasn’t enough money in your account last month, Microsoft will keep trying to take the payment. That’s why the missed payment and the next one might happen close together and look like a double charge.
See 'I've been charged twice': https://support.microsoft.com/account-billing/i-ve-been-charged-twice-1370f860-c080-419a-8e77-a983389743a5