Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hello ANG08,
Microsoft accounts can't be merged, and subscriptions on separate accounts can't be combined into one. If you're moving from a personal plan to a business plan, Microsoft has a guide for that switch: Switch to a Microsoft 365 for business subscription | Microsoft Support. Depending on what you'd like to achieve, there's usually another way to get there, for example moving your email and files into a single business account.
For additional assistance, use this link to find the appropriate contact number from your region: Contact Microsoft customer support | Microsoft Support
I hope this helps. Looking forward to your reply