Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Are you referring to Microsoft CashBack or have you cancelled a Microsoft 365 subscription and want to stop that?
1
If it is Microsoft 365 CashBack, there is no separate process to cancel Cash Back, to do that you would need to opt out of Bing Rewards using the steps they provide on this link.
https://support.microsoft.com/en-us/accounts-billing/rewards/how-to-opt-out-of-microsoft-rewards
2
If this has something to do with a Microsoft 365 subscription, please provide full details on the problem.