To remove orders on a specific time frame permission BOH4 ORDER DELETE needs to be added and enable settings ALLOW_ORDER_DELETION. Once logged in to the Back Office, click on the orders you want to remove. Once done, on the left side you will have a trash can icon after clicking on it orders selected will be removed.
The store's main contact needs to send an email request. Once received, the development will turn on the setting to allow order deletion.