My name is ***** ***** I am an experienced criminal
I am sorry to hear about your difficulties. An intrusion of this magnitude would not be lawful unless justified by a warrant based on probable cause
that surveillance would yield evidence of criminal activity of a sort that would compromise global security. Otherwise the intrusion would be simply pointless and entirely improper.
The difficulty is, as you have already found for yourself, such surveillance is difficult to prove. Even you don't seem to know who is behind it or to be able to show anyone something which would allow them to see for themselves what you are experiencing.
Until you can show irrefutable evidence that what you are complaining about is actually happening to you, all of the agencies, organizations, and people you contact are going to turn a deaf ear to your problem and tell you it's a mental health problem. You know this already, because that's just what they're telling you.
You need to start collecting evidence that others can see as well as you see this for yourself. Until you can provide the authorities with this concrete evidence that you are a target of surveillance, nothing is going to change how others see this. You should be taking photos and videos and/or recording, when you have evidence of this surveillance for example. You may also want to utilize the services of a private investigator to find corroborating evidence of surveillance. With that, you should be able to change minds. If you are unable to get such evidence, you may have to consider the possibility that they may be correct.