Keep trying, analyze the latest entries in your category and try to figure it out, also keep asking here on the forum maybe other experienced authors can help.
Do not take offense, Envato gets items approved very very difficult these days.
Don’t give up, work hard, have patience and never ever argue with the reviewer if he is saying that something is not good agree and find a way to fix it, hopefully, you will get a good reviewer!
Take care. Tibi - FWD.