What is the make/model of the device that you are using?
I am sorry that you are upset about the process - I am only a tech on the site and I cannot control it.
Is it an Android tablet? iOS tablet? I will need more information in order to help you delete the app.
The make/model information should be on the front or back of the tablet.
Thank you for the update. Unfortunately, it would be impossible to troubleshoot on your tablet without a model number.
If the tablet is a touch-screen, you can hold down your finger on the Facebook app to uninstall/delete it.