What is the solution for the fear of jinn, and the intrusive thoughts of "I challenge God" during prayer, along with a feeling of external control and intense itching that disappears after prayer, despite seeking forgiveness and refuge [with God]?

There is no accountability for the whispers that occur in the mind as long as they are not spoken or acted upon, because a Muslim's detestation of these whispers is evidence of his faith, and they only arise from the devil's action against those he has failed to mislead. As for scratching, if it is involuntary, there is no blame. If it is possible to avoid it, then one must strive against oneself by restraining the hands and placing them in their rightful positions according to Islamic law. To get rid of the fear of jinn, it is recommended to be courageous, trust in Allah, rely on Him, dispel delusions, and frequently remember Allah and recite the prescribed remembrances, such as "None has the right to be worshipped but Allah alone, Who has no partner. To Him belongs all sovereignty and praise, and He is over all things competent," one hundred times, and the supplication: "O Allah, I seek refuge in You from anxiety and sorrow, from inability and laziness, from cowardice and miserliness, from the burden of debt and from being overcome by men."