To remove a page, go to Business Settings and select Accounts. Then click Pages and choose the Page you’d like to get rid of. Select Remove from the drop-down menu that appears.
In your Ad Accounts list, click the Settings link in the left-hand column and scroll down to Ad Account Roles. Select X next to the user’s permission status (for example, General User). A window appears asking if you want to remove this person from your account. Click Remove.
Go to Ads Manager Settings. You may be prompted to re-enter your password. Under the Ad Agency header, click Deactivate Ad Account. (If you’re asked for a reason, it’s optional.) The account will be deactivated automatically when you leave this page; there is no need to do anything else (optional). Click Deactivate
If you’re having issues with the Ads Manager, you might want to clear it out. Keep in mind that any customized settings, such as custom columns (which we’ll discuss later), will be lost.
If you only stop or delete the deal in the middle, Facebook (Instagram) will not charge you for the rest of the time. So there’s no need to get money back because the money won’t be refunded.