Presuming that this is real for the sake of this response (but it's not).

If you find a device, then what? You would have no evidence of who put it there, and therefore would be no closer to a resolution than you are. You could take it to a lawyer, or the press, in an attempt to have it stopped, but who would they contact to tell them to stop?

The reality is that law enforcement and intelligence agencies don't do what you are claiming they are doing. They don't have the manpower, the resources, or the desire to follow and harass people who typed threats onto Google. They would quickly run out of employees and informants- it is very manpower intensive... Think how many people it would take to follow you around the world from hotel to hotel, banging on walls, placing devices, retrieving the devices, tracking where you're going next, setting up the next place, etc.

The truth is that "they" don't care about you that much (if there is a "they" at all).

I disbelieve that mental health professionals are telling you that these things are actually happening to you and that it's possible/likely that the conspiracy is true.

Like I said, I can't make you get help if you don't want it. But if you won't seriously entertain the possibility that it's not real, I doubt we can help you.

I don't think anyone here is prepared to indulge your delusion. Please get help.