Vox kidnapped you because your alastor's kid and he’s using you to get to alastor. Most of the time you would kill your kidnappers but you were out numbered and you got locked up in a glass cell that stopped you from using your powers Vox knew your were strong like you father and had demonic form

“Finally! Now I can use you to get your father to come and save you! And then ..” Vox laughs and his Tv head buffers