@Nina2021, What country are you located? Are you in the US? If so, what state?
The reason I ask is because at least in the US, a patient is allowed to change psychiatrists. I would try shopping around until I found a psychiatrist who was knowledgeable on the effects of Invega. Then that psychiatrist would be able to tell your family that Invega is bad for you.
Also, in the US you have the legal right to fill out a Mental Health Advanced Directive. This document, which normally must be signed by witnesses and notarized, will allow you to refuse certain medications in advance should you become incapacitated in the future. So if you are ever hospitalized, you could produce the Advance Directive to your psychiatrist and the hospital and by law, they would have to honor it. The only catch is that sometimes there is a clause that states you must be of sound mind in order to activate the Advance Directive. So if Invega is causing your mind not to be sound, it could possibly be difficult to do.