Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello,
If your subscription was purchased via Best Buy, you would need to manage the subscription via them. Microsoft explains it here: https://support.microsoft.com/en-us/account-billing/manage-your-microsoft-365-subscription-purchased-through-a-third-party-44749f45-4c0b-5d41-a73f-7634b8d2a763
However, if this subscription is canceld and also expired, you are free to sign up directly with Microsoft. https://www.microsoft.com/en-us/microsoft-365/buy/compare-all-microsoft-365-products-b