Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
When you activate a Microsoft 365 licence or subscription, that gets permanently associated to the Microsoft account used to activate it, and there is no method provided to move an Office licence or subscription to another Microsoft account, the best option would be to use the steps provided on this link to cancel that subscription to get a refund, then take out a new subscription on the correct Microsoft Account.