I want to know how to use my camera without subscribing to the service.

@rttate1​ You will have to call support again, if they're still untrained, ask for a supervisor, their over there support evidently don't ask for clarification.

If you said cancel they turn it off, if you ask for downgrade to self monitoring then you should still be able to use the system some, live views, sensors, arming disarming, alarm notifications etc. limited.

@rttate1​  I don't think they can shut down your cameras remotely.  They will work no matter what if powered on.   The only issue is whether you can store video.  Which you can't without a subscription.   So you need to explain what you mean by "they shut down all my cameras".   

@rttate1​ What is the exact issue that you are experiencing with your cameras? If you aren't subscribed to a monitoring plan your cameras should be able to detect motion and livestream. But in order for your cameras to record and save videos, a monitoring plan is required.

@dlpsr​

He'll probably have to set it up all over again.

This may happen to others but I cancelled recently and I didn't have to set anything up again. That said, the sensors I had set to secret alert STAYED set to secret alert (despite that not being an option any longer) which caused some alarm. (No pun intended.) Oh and they're still trying to charge my card regularly and are bombarding me via text, in the app, etc. about how I haven't paid for the monitoring I don't have.