sony z ultra c6802 stuck on sony logo(please help me out)

i just tried to install a paid theme on my sony z ultra C6802 build no14.6.A.1.236 from blackmart but when i applied it no changes happened so i tried to restart my device but it is nw stuck on sony logo it just auto restarts and gets stuck on sony logo (rooted with kingo root) plz guys help me as i dont know what to do pppplllzzzz helppp

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