Akeeba SocialMagick can be uninstalled just like any other Joomla extension.
Uninstalling Akeeba SocialMagick will delete your templates, any any generated OpenGraph images. There is no further confirmation. This process is IRREVERSIBLE. If you lose your settings and images by uninstalling Akeeba SocialMagick we cannot help you retrieve them, they are gone forever.
First, go the extensions manager page. From the sidebar of your Joomla! Administrator click on . On the new page find the Manage area towards the top of the middle column and click the link.
In the Search box type Akeeba SocialMagick package. It will show you a single item called "Akeeba SocialMagick package" whose Type is Package.
Only ever try to uninstall the Package type extension. DO NOT try to uninstall the component, its plugins or module individually. It will leave stuff behind.
Select the item's checkbox and click on the button in the toolbar. The extension and all its dependencies will be automatically uninstalled.